Rest - why you need it

Our bodies need rest in order to function properly. Does your car engine get stronger if you never turn it off? We get stronger, not during the workout, but when we rest and recover…

Growth hormone is produced when we sleep deeply and at no other time. So being horizontal is when you get to rebuild everything that training is working hard to stress and “tear down”

Bill Bowerman took a technique from Arthur Lydiard and coined the term “tough-easy” for every day that you work hard you need an easy workout to follow-up with. Easy is PE 3-4 and hard is a very long run or anything in the PE 5 & above category. Recall the post on pace and running form talks about PE, perceived effort and where your tachometer should be most of the time.

Masters runners & folks who are no longer acting like they are 20 years old often find they need a day off between workouts. This allows a more full recovery between workouts & thus you get quality workouts every time you go big. Once you are older than 20 you realize it is mostly about quality, isn’t it?

I’ll be referring you to a copy of a great article by Bridget Clark, titled Training Error – Overuse or Under-recovery? from the April 2010 issue of Ultrarunning. Her graphs are worth a thousand words as she explains the body’s response to training stimulus and how many of us will induce another stimulus (running) before we can rebuild, leading to overwhelming our systems and inching closer to the “injury threshold” in the process.
She goes a step further and talks about the idea that cross training, especially strength training, provides a stimulus that is different than running and is also non-load bearing so that the tissues build capacity and recovers better without undue stress.

Does it sound confusing that I would encourage you to exercise and then ask you to take it easy while doing it? Reframe the idea in terms of the law of diminishing returns you already know from the office. When you do not get a vacation from work or a weekend off, you become dull and less fun. Further, if you do not have adequate time to process the challenges at work (rebuild) then you begin to see diminishing returns as well – we push the pace and things begin to get dropped on your plate. Let me quote Bridget Clark, from her Training Error article, “we now have a wealth of research in sports science covering the past 30 years. With the rate of running injuries so prevalent, potential causes have been studied up and down.” She summarizes this body of research by saying, “training error is the only factor that consistently displays a direct cause and effect relationship with running injuries”. She has the doctorate in Physical Therapy, and her argument makes sense intuitively. Sometimes we will suffer what she refers to as a traumatic injury – one example would be me hitting my head on a low limb during a run and causing a goose-egg style welt to appear. The second and much more common injury is overuse, with two studies cited, ten years apart, each showing 70% of runners see these overuse injuries. We simply do not allow enough time for the body to recover and rebuild as stronger before we load it up again. Slow or abrupt degenerative damage results as we spiral toward what Bridget Clark calls injury threshold.

Remember how we talked about the injury cycle? There are 4 distinct phases - all easy to remember and each gets worse.
One: I sprain/tweak my ankle and so it hurts a bit after the run.
Two: I run on it for two weeks as I normally would, without slowing down or doing any “rehab” of the injury and now it hurts during and after the run.
Three: A week after that it hurts before, during and after the run.
Four: Finally it hurts too much to run, and hurts all the time – is this my ankles fault? Am I now meant to run? If you are in my class I think you can answer this question pretty well…

The good news is that you can apply this sports injury model to your overall sense of well being and thus guard against over training. The FIRST program, Dr. Maffetone, and Dr. Tim Noakes in his book all talk about a runner getting progressively more tired, feeling that performance plateaus and then drops, notices that immune system function begins to decline and may even see mood changes or swings in much the same way that extreme stress has been shown to affect people. We should be alert for trends over time and look out for a common acronym in prehospital care called DIC head syndrome. Disoriented, Irritable and Combative. A number of things can cause this and some could be acute problems such as; you could have low blood sugar, could be suffering from the heat, or maybe something more chronic could be overtraining syndrome. Everybody has different physiological set point for this (you are an experiment of one) and it varies depending upon what else is going on in your life as well. It is a fine line for some and gets easier to discern as your “aches and pains” database expands and as you learn more about your training process as journey of minor stressors and growing stronger from each stressor. Tired is natural, while tired with lingering effects and inability to refresh may need intervention. As you might guess, this is much easier to spot in others, outside yourself. Your training log will help you here as well as your running buddies.

Remember when we talked at the beginning about your running log? How you should examine your workouts and they will tell you a great deal about where you and how far you have come? This document can become an important window into how you are doing if you are without a coach or a regular running buddy who can spot your holistic well being. Author Tim Noakes gives a number of suggestions that you may wish to record in your running logbook that extend beyond the idea of mileage, route, shoes worn and time elapsed.
1) How did the run go? We all have a growing “aches and pains database” and this plays a role but on the trend side you want things to get gradually better.
2) What was your effort rating (or PE, perceived effort): If easy workouts feel hard this week, I ask the question “what has changed?”
3) Did you enjoy it – or any part of it? Nearly every run has both good a bad spots and if they do not pass easily out of the bad, I ask the same question as above, or if things clicked – what helped is good information too.
4) You waking pulse rate: I asked you to take a baseline pulse as homework because we want to see improvements and look for spikes in this rate, or a new creep upward, as a sign we must heed.
5) Early morning body weight: This is the best time to get a reading (after the gastrocolic reflex occurs) and this number will fluctuate but we hope that there is not a continued drop over time – a loss of appetite or persistent loss is considered an overtraining sign.
6) Number of hours slept: You know where this is going – get to bed!
7) Heart rate during the workout: This can also tell us about what you are feeling, are you pushing too hard or is it taking more effort to do what was easier to execute two weeks ago? Over time the same route should get a bit faster or easier without increasing heart rate above your regular workout numbers. See the previous lesson about pace to get a Dr. Maffetone recommended pulse rate for your steady state runs.

This kind of data will allow insight toward overtraining trends or on the bright side – when you can bump things up a notch. Many starting out will say “I do not want to bump anything, right now – I am stressed enough!” and that may be true, however 3-4 weeks without changes toward the positive side of the ledger, and no deleterious effects either means that you have hit your plateau at this exertion level and it is time to vary the workload or increase intensity for a new phase. This gradually makes you better at what you are pursuing.

If something hurts for two or more days then take 2 or more days off – simple. During that time stretch, RICE and examine what has changed that would cause the injury – but don’t assume running through it as normal, will be the cure. You will have to use active rest and modify your expectations while learning about the root cause of injury. Here is a great thought, “healing, is not a science, but the intuitive art of wooing nature." - W.H. Auden

If you are sick from the neck up – go ahead and run (it may even help) If you are sick from the neck down – consider sitting this one out.

Expect that you’ll need to take better care of yourself and wash your hands more frequently when your mileage drops. Your immune system is cranking at peak capacity when you are running & when mileage drops sometimes the immune system takes a vacation too.

When you are getting strong running performances each week, you can gain 90% of all possible fitness developments with 4 days/week of running. You may get that extra 10% with 5 or more days each week but what you’ll find is that the number of injuries you see in the runner is appreciably higher.

Trouble signs of overtraining
Injury – muscles not allowed to recover well between workouts suffer from stress injury. Failing running form in the tired athlete leads to excessive pounding, favoring something compounds imbalances. Do not become a sport limper or it will get worse somewhere else on your machine!
Sickness – While running stimulates the immune system, too much too soon - or inadequate rest – allows the body to be susceptible to illness or infection – once you are ground down to nothing, illness sets up shop.
Slump – remember that loss or impairment of higher brain function is one way that the body shows early sign of problems. Irritability, restlessness, trouble sleeping, depression and malaise indicate that you need a rest week (decrease in training volume, additional rest days, 8+ hours of sleep nightly)

How much rest? For starters we stay within the 10% rule, so that we rarely increase training load by more than 10% in any week. We also seek to vary the training cycle and get you some rest every four weeks as a means for you to absorb your training. Within that parameter you’ll also need at least one extra minute per night for each mile you train that week. EG: If you run 15 miles in a week, you’ll need 15 extra minutes each night that week. Closer to race time - seek to allow an extra hour of sleep each evening. Olympic Marathoner Ryan Hall is in bed at 9:30pm every night. You do not spend 12 hours a day there, but you get what you need to charge up for your event.

One last resting tip is feet up - allowing time for fluid exchange (assisted by gravity) not only feels great but really speeds recovery. Racers are now using pressure stockings to gain the same benefit while sitting at their desks. Blood return and elevation are great things for tired feet and lower legs.