How Resting Truly Makes You Stronger
Friday, May 23rd, 2008I don’t know how many times we have to hear it and tell athletes the merit, value and reason for those easy spins and days off the bike. What I do know, is that until I saw it explained via the raw data provided to use by power meters, I only understood it intellectually as well.
However, when the ability to Monitor Training Stress and it’s effects on the body with power meters came into existence, I, like so many whom I have since shown afterwards, finally truly understood what this meant. And why is that? Because now we could see it with our very own eyes.
Why it takes our silly scientific minds so long to actually listen to and trust what our hearts, minds and bodies have been telling us for decades is a topic for a completely different day and time.
For now, I’ll stick to using a simple explanation that I just sent to one of my own athletes who was asking about what I was seeing in her power meter files as of late and if progress was a part of that which I was seeing.
Well, I’ll let you be the judge for yourself by examining this graph that belongs to a client of mine and the following explanation as to how to interpret it and what it means, and hope that you too become a true believer in the power of rest in the process.

Here’s what I was talking about where the training stress model evidences an almost perfect rise to the right.
The pink is the ATL (Acute Training Load) and the Yellow is the TSB (Training Stress Balance), which shows the relationship that the stress from the workouts you do combined with rest affects your overall fitness level as evidenced by your CTL (Chronic Training Load) in blue.
As you can see, there is an inverse relationship between the ATL and the TSB. Whenever you are training, the CTL is high and the TSB is low, meaning you are training which causes fatigue. Each time you do a block of training , the ATL (pink or fatigue level) goes up and the TSB (yellow or your freshness) goes down.
However, the exact opposite is true when you rest, your ATL comes down and your TSB comes up, and this is where you want to be when you’re going into a key event. You are rested (as evidenced by the higher TSB) and fit, (as evidenced by the overall increase in the CTL.
This is the ultimate explanation for that age old saying that we only get stronger when we rest and that “training only creates the potential for fitness, resting realizes is”. –Andy Coggan
Until people see it here as evidenced by the numbers, they say that they understand it, but only intellectually. It’s not until they really see it that they really get it and then feel a heck of a lot better about those active recovery spins and days off.
The level and shape of the CTL (chronic training load or cumulative fitness that results from resting and racing) is the direct result of the type and amount of training we do as well as the type and amount of resting that we do.
As you can see, you have been in a continuous linear increase overall to the right all year which is, of course, by design.:-)
What typically happens around the time we start racing and doing shorter, harder workouts is that the CTL starts to level out and sometimes drop a bit, which isn’t something to worry about. It just means that we are turning your fitness into another form, which is usually speed and power and if the CTL continued to raise indefinitely, then you’d always be tired and never be able to truly tap into the fitness you have built for yourself.
I hope this sheds some light on things for anyone who happens to read this post as it certainly did for me the first time that Hunter Allen eagerly and excitedly showed it to me long before it showed up in their baby, which is no what’s referred to as WKO+.
While I believe that the most exciting and powerful changes occur within the heart and the mind, I’m as big a numbers geek as anyone, and knowing the numbers is a fundamental part of working with athletes today no matter how you slice it. I just prefer them when they slice nicely!
-JS

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