Bare foot running

Barefooting – what and why? YMCA, LTR 2011

When I first started this piece on barefoot running several years ago, there was just a bit of material in the popular media about natural running style. I even had a handout from Ultrarunner magazine about adopting some barefoot running, because this was an article that was fresh and addressed the topic in the mainstream. I am happy to say that the world has changed a bit, and now the terms barefoot and natural running have achieved almost “Kleenex” status in the common vernacular and I now only need to give you the basics while pointing you to dozens of great resources on the topic, including an entire book written by Dr. Daniel Howell, about all of the health benefits of not wearing shoes.

While the book Born To Run and the recently published research of Dr. Dan Leiberman seems to have energized the term barefooting – running barefoot did not start in 2009 or even in this century. While I would encourage you to read the work of both of these guys – I’ll take a minute to point out some highlights of how we got to running shoes in the 20^th century. I hope to also spark a bit of thought about what things looked like before shoes and how that factors into where we are at today. I kept my shoes through this fervor about bare feet, but I can tell you that my thinking, as well as my shoe choices, continues to evolve over time on this subject. I think that every runner should look at the history of our sport and can take a lesson from what shoeless or minimal shoe training can do for your running.

The feet have 26 bones, 33 joints, 12 tendons, 18 muscles; each foot is an amazing piece of machinery and while it has many things it does not have others – so why it is made this way and what was it for in the first place?

Science has made a great case for a theory that the current form of humans evolved and succeeded as a species due to 26 different, running specific, adaptations. These adaptations allowed us to pursue quarry on the move, at a rate just fast enough to tire that animal out, while we have the innate endurance to finish the hunt and gain groceries. Again, Dr. Dan Leiberman offers a much more through explanation of this theory and it is solidly based in the science of biology and comparative biology. We were able to travel, pretty fast, and fast enough to win food and cross great distances. Clearly, we did this without shoes and anthropologists have not found any evidence of Nikes from this critical time period. 

Until Bill Bowerman, the famous University of Oregon track coach, created the running shoe in America in 1972, just 39 years ago, we all ran in very thin light shoes that offered little in the way of a heel cushion or padding from the ground. I have read that he designed the shoe to accommodate what he felt would be a longer and more competitive stride for his athletes. He could teach them to lead with the heel and the longer stride length would out run the competition. Bowerman was NOT a physical therapist, medical doctor or biologist who may have asked, “what might this lead to, other than winning races?”

Currently in Africa and many parts of the developing world, children are raised without transportation and also without footwear. It is estimated that the average Kenyan child has about 1,800 miles on their legs and feet by the time they graduate from primary school and all of these miles, for the majority of kids, are without shoes of any kind. It has been argued that this contributes to the number of victories for great Kenyan runners at the international level and on the Olympic podium. Early leg development and natural foot strength (at altitude, Kenya is a mountainous region with an altitude similar to Flagstaff, AZ) allow these kids to develop all the capabilities of their legs before serious training ever begins for competition.

Many cultures are able to train and run well without shoes or with minimal shoes. The Tarahumara Indians of Mexico are featured in Born To Run for their great ability and running in very simple sandals – a slab of rubber strapped to their feet for protection from sharp objects. This is a similar style of shoe to many early Nations of the American Southwest and the pre Spanish cultures in South America such as the Maya and Inca who had thousands of miles of roads and very little in the way of shoes to traverse them. In those days a severe running injury would cause you to drop lower on the food chain – a deadly prospect. So it might be safe (or humorous) to assume that if running injuries did occur in Inca runners – these runners did not pass on the genes for any fragile lower legs and knees.

According to Christopher McDougall’s book Born to Run, Alan Webb’s feet where flat and three sizes larger when he started working with his high school coach to become America’s new top miler. In 2007 Alan set the world’s best 1,500 meter time and broke Jim Ryun’s American record for the mile. But his quest began with flat, weak, de-conditioned feet that were in need of rebuilding. McDougall writes about an interview with Alan Webb on page 175 of his book and Webb says “ I had injury problems early on, … so we did foot strengthening drills and special walks in bare feet” McDougall writes that Alan’s feet changed and his arches became higher as muscles strengthened – his shoe size decreased and his injuries abated.

McDougall writes of an Irish Ph.D, Gerard Hartman who is considered an expert in physical therapy and works with professional runners from around the globe to improve their running. He has been a proponent of barefoot running for many years and cites that “the deconditioned musculature of the foot is the greatest issue leading to running injury, and we’ve allowed our feet to become badly deconditioned over the past twenty-five years”. Many folks have advocated that slowly and gently strengthening our feet over time will allow us to run better and with less injury. We may even find that we can run in lighter footwear. Lighter footwear means less effort and perhaps faster or the sensation of faster as the weight on the end of your leg from a heavy shoe creates a pendulum that takes effort in order to keep moving. 

What do shoes do for me? While all seem to agree that having a sole cover your tender skin provides some protection – many experts are currently reexamining what shoes do well and do not do so well. The good news about this controversy is that in the past 38 years, very little substantive research has been done on how shoes truly affect feet and that is beginning to change now. The United States Military is greatly invested in physical conditioning of its personnel and in the past has seen very high rates of injury in basic training and its share of running related injuries. A recent study on determining the appropriate footwear has shown that the type of running shoe had no correlation on injury prevention for the military personnel in the study. This leads us to “well what can I use to control the movement of my foot, for the least chance of injury?” Your gait, how your foot hits the ground and your running technique becomes more important than the type of running shoe that you might wear according to this study. Manufacturers have succeeded in creating footwear that controls movements of the foot and offers important padding from the ground as you begin running. However, seeking to control the movement of the foot by using a shoe will not ultimately be successful in preventing injury, in the long run, according to new studies. Technique will carry the day and great technique; sensitive feet that are aware of what they hit (and strong feet) may lead to using a much lighter shoe down the road. 

So why do we not teach barefoot running in the Learn to Run class? There are three big reasons in my mind, about why we cover this content as a lesson rather than a focus. First is that the process must be very gradual, even more gradual than learning to run, so we do not really have time in class to retrain what 30 or more years of wearing shoes has done with your feet. Second is that all of us have deconditioned feet similar to what Dr. Hartman discusses above – and this means that we have to slowly build up foot strength, even before we start running in minimalist footwear. I think that if you have already come from a culture of shoes that you will want to learn running first and then learn to reduce how much shoe you use. Third is that the only examples of people being injured with natural running come from runners who, in their enthusiasm, progress too quickly in bare feet or minimal shoes. One of my stated objectives for the class is to introduce you to a new lifelong activity, injury free. Therefore I do that with what your feet are already used to, and provide resources, and hopefully a strong dose of caution to you, while encouraging those who want to move their running to the next level to try strengthening their feet.

In the current day a larger percentage of runners are now dedicated to running entirely without shoes. They have run marathons, ultra marathons and farther in bare feet, and a second subgroup simply enjoys being barefoot full time, so they carry flip-flops with them to get into Wal-Mart or a restaurant. You can read their websites and their ideas about what shoes do and do not do for the wearer and how they feel more free with naked feet. There are as many reasons to consider shoeless as there are folks not wearing shoes. I would challenge you to consider the common thinking on this matter and both accept those who forgo footwear, as well as reconsider what you may gain from simply being barefoot at home or in the yard.

Before you assume that the “barefoot guys” are off the deep end in their “foot yogi-mysticism”, take a good look at the number of people from the medical community that advocate the sale of moccasins to children and preach “barefoot is best” for toddlers. The reason for this, they advocate, is that kids walk sooner when they learn to interpret the ground with their feet (proprioception) and build foot strength naturally. They do not want kids to cut their feet and thus sell a light flexible protective moc- type shoe to achieve this. Many parents have subscribed to this idea with the pediatricians blessing and I’ve seen it work for my own kid. (As I was buying lots of shoes for my running, at $80/pair…)

Arthur Lydiard was a cobbler and made shoes before he was a coach. A coach who was very focused on the success of his athletes. He had his runners in the most basic of footwear and preached against anything “more” for his entire career, which extended well into the era of modern shoes. Internationally sought after coach and physician, Dr. Phil Maffetone was suggesting more than a decade ago that minimal footwear was preferable for similar reasons. Even Stanford University’s world class track and cross country coach (the program gets Nike’s for free) has had his athletes running barefoot in the grass, two afternoons a week, for decades. He said to Nike that his guys got hurt less when they subscribed to this method. (This is what drove Nike to work with Dr. Gerard Hartman to create the Nike Free.) Long before the birth of the very popular Vibram Five Fingers shoe – many companies across the country have made a living manufacturing simple moccasins and unstructured footwear that allow the foot to move and muscles to work. Inuit people, north of the Arctic Circle knew that this is what kept their feet warm in winter – that the boot would flex and allow better circulation. 

So before you ever consider running barefoot, simply walking around without shoes at home is a good place to start and walking farther progressively is another. You may choose to try the new Vibram Five Fingers Shoes as well, which offer that slight amount of protection for your tender skin and not much else for padding. I have started using theses on very short runs (by time) and adding minutes each week very slowly. I spent a year reworking my stride before I ran with these shoes so that I am not landing on my heel much at all but using the mid-foot and most of my foot to absorb the impact of each step. To acquire a lighter step you can practice this technique while walking – you need not run in order to learn how to walk more gently and with a light step. Recall what I have said in many in stride analysis sessions – that cadence, how often your feet hit the ground, has everything to do with a light step. Walking or running, your step must be smaller and faster to achieve lower impact forces. 

For two years now the Outdoor Retailer Trade show saw scores of outdoor footwear manufacturers gunning for a piece of the barefoot pie, gearing up to make “thneeds”, or feather weight running shoes for everyone who wants to run barefoot. The marketplace is now flooded with these new shoes, some of them are untested, un-researched shoes as well. You may choose to try them or go barefoot, grab some moccasins, run in cheaper “race flats” or just try your old Chuck Taylor’s like Lydiard ran in for decades. One key criterion for choosing these shoes is that they should not have an elevated heel. Your foot should be neutral from front to back, just as if you were barefoot on the floor. Most of us can adapt to this well if asked to do so slowly – because you have never seen a baby or an east African in high heels.

But think about a deliberate program of gentle foot strengthening for yourself as a possible next step in your program and add it gradually, just like you started running. A foot that “knows the ground” and is most sensitive, may be less likely to sprain an ankle, will run trails better and may run slower at first but that is OK, you’re in shape and will not “de-train” as a part of this process. Your lower legs will continue to develop in a way that may reduce your injuries over time and your stride will adapt to something that is more powerful in the long run. That is what I want for your running – long running for the long run. So run gently out there.

Read an article about the study here http://well.blogs.nytimes.com/2010/07/21/phys-ed-do-certain-types-of-sneakers-prevent-injuries/?emc=eta1

The study here http://www.ncbi.nlm.nih.gov/pubmed/20576837

Danny Dryers list of preferred light weight shoes
http://chirunning.com/blogs/danny/2010/02/07/chirunning-recommendations-for-minimal-shoes/comment-page-2/#comment-1330

Interesting article on shoes from a rehab perspective

http://www.chirunning.com/shop/pages.php?tab=r&pageid=18&id=575

I have also added several new links on the toolbar here to assist you in learning more about natural running style. If you ever plan to increase your training volume, or wish to develop further as an injury free runner, you owe it to yourself to look over the current research in this area.

Barefooting – what and why?

This installment comes with a handout you can pick up at the YMCA desk until Oct 1st...

While the book Born To Run and the recently published research of Dr. Dan Leiberman seems to have energized the term barefooting and made it into almost a household word – running barefoot did not start in 2009 or even in this century. While I would encourage you to read the work of both of these guys – I’ll take a minute to point out some highlights of how we got to running shoes in the 20th century. I hope to also spark a bit of thought about what things looked like before shoes and how that factors into where we are at today. I will refer you to a great article in Ultrarunning magazine as well, which is a great summary of why you should or should not dump the nice running shoes I asked you to buy in the first place. I kept my shoes but I think that every runner should look at the history of our sport and can take a lesson from what shoeless or minimal shoes can do for your running.

26 bones, 33 joints, 12 tendons, 18 muscles; each foot is an amazing piece of machinery and while it has many things it does not have others – so why it is made this way and what was it for in the first place?

Science has made a great case for a theory that the current form of humans evolved and succeeded as a species due to 26 different, running specific, adaptations. These adaptations allowed us to pursue quarry on the move, at a rate just fast enough to tire that animal out, while we have the innate endurance to finish the hunt and gain groceries. Again, Dr. Dan Leiberman offers a much more through explanation of this theory and it is solidly based in the science of biology and comparative biology. We were able to travel, pretty fast, and fast enough to win food and cross great distances. Clearly, we did this without shoes and anthropologists have not found any evidence of Nikes from this critical time period.

Until Bill Bowerman, the famous University of Oregon track coach, created the running shoe in America in 1972, just 38 years ago, we all ran in very thin light shoes that offered little in the way of a heel cushion or padding from the ground. I have read that he designed the shoe to accommodate what he felt would be a longer and more competitive stride for his athletes. He could teach them to lead with the heel and the longer stride length would out run the competition.

Currently in Africa and many parts of the developing world, children are raised without transportation and also without footwear. It is estimated that the average Kenyan child has about 1,800 miles on their legs and feet by the time they graduate from primary school and all of these miles, for the majority of kids, are without shoes of any kind. It has been argued that this contributes to the number of victories for great Kenyan runners at the international level and on the Olympic podium. Early leg development and natural foot strength (at altitude, Kenya is a mountainous region with an altitude similar to Flagstaff, AZ) allow these kids to develop all the capabilities of their legs before serious training ever begins for competition.

Many cultures are able to train and run well without shoes or with minimal shoes. The Tarahumara Indians of Mexico are featured in Born To Run for their great ability and running in very simple sandals – a slab of rubber strapped to their feet for protection from sharp objects. This is a similar style of shoe to many early Nations of the American Southwest and the pre Spanish cultures in South America such as the Maya and Inca who had thousands of miles of roads and very little in the way of shoes to traverse them. In those days a severe running injury would cause you to drop lower on the food chain – a deadly prospect. So it might be safe (or humorous) to assume that if running injuries did occur in Inca runners – these runners did not pass on the genes for any fragile lower legs and knees.

According to Christopher McDougall’s book Born to Run, Alan Webb’s feet where flat and three sizes larger when he started working with his high school coach to become America’s new top miler. In 2007 Alan set the world’s best 1,500 meter time and broke Jim Ryun’s American record for the mile. But his quest began with flat, weak, de-conditioned feet that were in need of rebuilding. McDougall writes about an interview with Alan Webb on page 175 of his book and Webb says “ I had injury problems early on, … so we did foot strengthening drills and special walks in bare feet” McDougall writes that Alan’s feet changed and his arches became higher as muscles strengthened – his shoe size decreased and his injuries abated.

McDougall writes of an Irish Ph.D, Gerard Hartman who is considered an expert in physical therapy and works with professional runners from around the globe to improve their running. He has been a proponent of barefoot running for many years and cites that “the deconditioned musculature of the foot is the greatest issue leading to running injury, and we’ve allowed our feet to become badly deconditioned over the past twenty-five years”. Many folks have advocated that slowly and gently strengthening our feet over time will allow us to run better and with less injury. We may even find that we can run in lighter footwear. Lighter footwear means less effort and perhaps faster or the sensation of faster as the weight on the end of your leg from a heavy shoe creates a pendulum that takes effort to keep moving.

What do shoes do for me? While all seem to agree that having a sole cover your tender skin provides some protection – many experts are currently reexamining what shoes do well and do not do so well. The good news about this controversy is that in the past 38 years, very little substantive research has been done on how shoes truly affect feet and that is beginning to change now. The United States Military is greatly invested in physical conditioning of its personnel and in the past has seen very high rates of injury in basic training and its share of running related injuries. A recent study on determining the appropriate footwear has shown that the type of running shoe had no correlation on injury prevention for the military personnel in the study. This leads us to “well what can I use to control the movement of my foot, for the least chance of injury?” Your gait, how your foot hits the ground and your running technique becomes more important than the type of running shoe that you might wear according to this study. Manufacturers have succeeded in creating footwear that controls movements of the foot and offers important padding from the ground as you begin running. However, seeking to control the movement of the foot by using a shoe will not be successful in the long run according to new studies. Technique will carry the day and great technique; sensitive feet that are aware of what they hit (and strong feet) may lead to using a much lighter shoe down the road.

In the current day there is an entire tribe of folks dedicated to running entirely without shoes. They have run marathons, ultra marathons and farther in bare feet, and carry flip-flops with them to get into Wal-Mart or a restaurant. You can read their websites and their ideas about what shoes do and do not do for the wearer and how they feel more free with naked feet.
These “barefoot guys” read a bit like they are off the deep end – “foot yogi-mysticism” or something. However, take a good look at the number of people from the medical community that advocate the sale of moccasins to children and preach “barefoot is best” for toddlers. The reason for this, they advocate, is that kids walk sooner when they learn to interpret the ground with their feet (proprioception) and build foot strength naturally. They do not want kids to cut their feet and thus sell a light flexible protective moc- type shoe to achieve this. Many parents have subscribed to this idea with the pediatricians blessing and I’ve seen it work for my own kids. (As I was buying lots of shoes for my running, at $80/pair…)

Arthur Lydiard was a cobbler and made shoes before he was a coach. A coach who was very focused on the success of his athletes. He had his runners in the most basic of footwear and preached against anything “more” for his entire career, which extended well into the era of modern shoes. Internationally sought after coach and physician, Dr. Phil Maffetone was suggesting more than a decade ago that minimal footwear was preferable for similar reasons.

Even Stanford University’s world class track and cross country coach (the program gets Nike’s for free) has had his athletes running barefoot in the grass, two afternoons a week, for decades. He said to Nike that his guys got hurt less when they subscribed to this method. (This is what drove Nike to work with Dr. Gerard Hartman to create the Nike Free.) Long before the birth of the very popular Vibram Five Fingers shoe – many companies across the country have made a living manufacturing simple moccasins and unstructured footwear that allow the foot to move and muscles to work. Inuit people, north of the Arctic Circle knew that this is what kept their feet warm in winter – that the boot would flex and allow better circulation.

While this is all good for some; I am most concerned with my runners being injury free, using the best technique and enjoying their running forever. Many will need something on their feet, at least in winter, to do this and barefooting may be something to try and work into their training program along with foot strengthening and conditioning.

Simply walking around without shoes at home is a good place to start and walking farther progressively is another. You may choose to try the new Vibram Five Fingers Shoes as well, which offer that slight amount of protection for your tender skin and not much else for padding. I have started using theses on very short runs (by time) and adding minutes each week very slowly. I spent a year reworking my stride before I ran with these shoes so that I am not landing on my heel much at all but using the mid-foot and most of my foot to absorb the impact of each step. Further you can practice this technique while walking – you need not run in order to learn how to walk more gently and with a light step.

So this year’s Outdoor Retailer Trade show saw scores of outdoor footwear manufacturers gunning for a piece of the barefoot pie, gearing up to make “thneeds”, or feather weight running shoes for everyone who wants to run barefoot. Get ready to see dozens of these models in the marketplace next year – like Crocs a few years ago, but sillier looking. You may choose to try them or go barefoot, grab some moccasins, run in cheaper “race flats” or just try your old Chuck Taylor’s like Lydiard ran in for decades. But think about a deliberate program of gentle foot strengthening for yourself as a possible next step in your program and add it gradually, just like you started running. Feet that “know the ground” and are sensitive, are less likely to sprain an ankle, will run trails better and may run slower at first but that is OK, you’re in shape and will not “detrain” as a part of this process. Your lower legs will continue to develop in a way that may reduce your injuries over time and your stride will adapt to something that is more powerful in the long run. That is what I want for your running – long running for the long run. So run gently out there.

Read an article about shoeless study here
The NIH article on the Army study here
Danny Dryers list of preferred light weight shoes

Interesting article on shoes from a rehab perspective

Heat and its affects on the runner

It is beginning to get hot and sticky and while you had an excuse before that it was too cool – you are now beginning to develop another one – that it may be too warm. Fear not because we discussed last week that there is no bad weather, only poor clothing choices and we’ll cover some tricks for all climates to get you through this. You should also know that our bodies have some truly unique adaptations which allow us to run, slowly, better than just about any other animal on the planet. Don’t take my word for it – read Dr. Dan Lieberman’s studies on the subject as they are very educational. [http://www.fas.harvard.edu/~skeleton/danlhome.html]

One of these amazing adaptations is that we can dump heat, fast and effectively if we are smart about it and keep up with our bodies’ adaptations. Your body will begin adapting and acclimatizing to the hot weather in only a few days but it will take several weeks to fully be able to thrive in higher temps. Ease into this w/ a slower pace as you adapt. While you are adapting lets think about heat and how you are going to control this variable.

When two objects of different temperature are placed in contact with each other heat moves from the warmer object to the cooler object. You need to know this – because it will work to your advantage, like when you run early in the morning and you are hotter than the air around you. The larger the temperature gradient, the faster heat will move into the air and away from you. Have you ever seen your coffee steam in the morning? This is a micro example of a temperature gradient. Do you know how Gore-Tex rainwear works? On a temperature/moisture gradient also – so if the weather is humid and hot – your Gore-Tex jacket accumulates perspiration and you do not feel as dry. So remember this above law and think about gradients as energy or fluid or material moving from high concentration to low concentration. Here are the primary ways heat moves or terms to define how heat is lost into the environment:

Conduction – immersion in water, tongue on a lamp post, lying on the ground – heat goes into the cooler object
Convection – wind pulling the warm air away from your body, a breeze of a fan help with this and the winter wind does this when you do want it to…
Radiation – heat moving into space, rising from your attic, your head or elsewhere – watch the heat radiate from the road sometime in shimmering waves seen from a distance
Evaporation – high evaporation = high cooling, like wet burlap on the cooler or wet fabric on skin, sweat leaving the skin – carries heat w/ it.

So you want to understand this basic terms and properties because they present real world opportunities for you to avoid overheating. At the cellular level half of the energy you burn is heat production, you’re warm and you can’t help it, but as I said you can work with it.

Do not stress about the heat. We are among the most well developed mammals on the planet for running in this weather. How does the body cool itself? Radiation, Convection and evaporative cooling are the primary means – respiration a secondary means and we have a large skin surface area to vasodilate blood vessels and dump heat. We are able to sweat and provide a large area for convection & evaporative cooling. The faster you have heat carried away the better, as high core temps equate to difficult running. Quick cooling; via evaporation, a breeze, skin in contact with open air to draw off heat these processes all accelerate the cooling process.

You must be hydrated and stay that way in order to run in the heat. Drink plenty of fluid on the days you run & sip water during your runs (16-32oz per hour of exercise or 3-6oz every 15-20 minutes.) How much to drink varies by your weight, metabolism, adaptation, climate and other factors. Until you know your fluid loss/sweat rate just remember what a bag of IV fluids does – steadily drips… You will need a steady drip of fluid replacement in order to perform at your best. We just read that evaporative loss has profound results in cooling you, and if you are not drinking almost as fast as you are sweating, you need not be an accountant to see deficits ahead.

So how fast am I sweating at a given temperature? The SWEAT TEST: You can weigh yourself nude before going out on the run. Weigh yourself nude after the run (sounds obvious but those clothes are full of water, so you do not weigh them.) Convert the number of ounces lost on your scale into ounces of fluid lost. If you had a drink on your run add that number to the total amount lost. You can then estimate, for those conditions, how much fluid you need on a run. So I start the run at 155 pounds and return weighing 153 pounds, meaning I lost two pounds. I had 16 ounces to drink and yet I still lost two pounds so I add that 16oz (one pound) to the total lost = 3 pounds. That means I need about 42 ounces (16oz X 3 pounds) of fluid to replace what I lost out there and get back to my regular weight. I was not sweating fat – I have to replace that lost water. Lost water is lost blood volume and that blood volume keeps me from getting dizzy, delivers oxygen and groceries to my recovering muscles, and takes out the garbage or lactic acid and metabolic waste from muscle efforts. I must know what I generally loose and I need to put it back in order to recover well – dehydrate athletes do not recover well, in fact they do not even digest food very well.

I use a calculator I found at Runners World as a comparison to my
weigh-in calculations for fluid needs. http://www.runnersworld.com/article/0,7120,s6-242-302--10084-2-1-2,00.html

Based on the above calculator a 180lb person would need the following quantity of fluid (in ounces) ea. hour as a minimum for the temperature 50F=5.4oz, 60F=5.7oz, 70F=5.9oz, 80F=6.5oz, 90F=7.3oz, 100F=8.4oz and for temperature I would use the “feels like” temperature the weather man uses – rather than your window thermometer - as this “feels like” includes the heat index calculations.

Research and the medical community seem to mostly agree that you do not want to lose more than 2% of your mass during a run. For example: a 130-pound woman can lose no more than 2.6 pounds. After that your brain does not thermoregulate as efficiently, low blood volume affects perfusion, and you do not generally work as well. Many folks experience mental status changes at this stage of fluid volume loss or may not pass the “tilt test”. This refers to the idea that they get dizzy when they change positions quickly; there is not adequate blood volume to keep up with all your efforts. Drugs can also affect your body’s response to heat and thermoregulation. If you are using amphetamines, thyroid medication, antipsychotics, excessive caffeine (above 500mg daily) or alcohol, you may respond differently to heat stress.

Listen to your body while running. Nausea and light headedness, cramping, irritability, dry & flushed/red skin, low urine output &/or dark urine, or a body that stops sweating is showing critical signs of stress. STOP running and cool off in the shade while getting help. Your body knows more than you do & heatstroke can kill you. Body Temps of 102-104 are survivable with emergency assistance while 107 will be critical but do not pull out a thermometer and read it. Instead remember that the longer someone is at a high temperature the more severe the long term effects. Chill immediately.

Remember that heat injuries affect the “level of consciousness” first. If your running partner seems unaware, confused or more combative than usual it may be the first sign of a problem.

Remember the “chill vest” you saw in the Beijing Olympics? Think about a run that includes a spin through the sprinkler, dip in the stream, or a shower every other lap. Try to keep your shoes dry to prevent blisters but keep your core temperature low so that the blood used to power your legs is not reallocated to cooling your body.

This low core temp concept is another strong argument for going out slow. You need to do your fast running, if any, closer to the end of your workout so that you can then cool down properly. Fast running early will leave you hotter and more sluggish throughout the workout.

Running very early or very late in the day is a big help. Consider night runs with reflectors and a flashlight as one way to beat the heat. Our area has several parks and a bike trail where you can run cool and not be concerned with traffic. While mornings may see the highest humidity levels, temperatures are lower and so the heat index is tolerable for many. Notice that many desert cultures cover themselves completely with light colors and loose clothing that allows air circulation. If you choose to bare the skin to speed cooling, wear your sunscreen.

Conduction cooling: many folks freeze a hat or bandanna and wear it to provide additional cooling. Some even stash a cooler out on the route for a second frozen hat or ice water. Dumping one cup of cold water over your head while drinking the other at aid stations may help. Choose shady routes and plan to slow down; one study has shown that 54 degrees is perfect for running and that we can expect each 7 degree increase above this temperature to slow runners one minute/mile.

HEAT INDEX the NWS provides these numbers for reference – when temperature & humidity meet or exceed these combinations you need to find a treadmill in the AC. Again our area has several great facilities for air-conditioned running and both enjoy brand new treadmills.
Temp Humidity

86 90
88 80
90 70
92 60
94 55
96 45
98 40

Research has shown that you can absorb as much as one liter/hour of fluid. Your minimum daily allowance of fluids is 8-10 glasses a day (64oz) but 128oz is even better for runners or folks who engage in an hour or more of exercise daily. You can “pre-hydrate” yourself on days you know you are running in the heat which is preventative because you can, after adapting to the heat, easily sweat 2 liters/hour during heavy exertion. You will benefit from the additional fluid volume for cooling the body as long as you do not drink more than you can absorb right before a run, which may lead to sloshing while you run. As long as you are eating a normal diet you will not need additional salt or electrolytes to adapt to heat and added salt may prove to be a stressor. Keep it simple with water and it’s cheaper – as well as always available. Sugars generally slow the absorption of fluids so while some may need sweeteners/drink mix to make water appealing to drink – be careful not to create a problem with gastric emptying pre-run.

Think about a water bottle, hydration pack, fanny pack or fuel belt that you can use to carry fluids during these very hot months. I do not target a lot of gear recommendations because every one likes their own style on this kind of thing, but something to keep you hydrated will make your runs safer and more enjoyable.