The take home message and a useful function of runscribe; is stated by alang in the first message:
“ advice is, if you are looking to change shoes, take your runScribe with you to the store and run in the shoes for a couple of minutes. The data can tell you a lot”.
Here’s my take…
This article by Tim is a good start point.
I like it because he uses the runscribe, but also uses other information alongside it to make decisions on shoe selection/suitability for him and makes some sound points.
The runscribe measures a number of biomechanical parameters, but these are 13 amongst many, also the evidence as to the importance of these variables in regard to injury risk is limited.
What we can take from the runscribe is our habitual measurements for each variable (let’s leave the issue of reliability, repeatability and measurement error for the moment).
What we can all agree upon is that after using the runscribe for a number of runs; is that we see; an habitual pattern to the biomechanical variables-our unique signature. So Tim has a shoe he likes, and he knows the variables associated with that shoe.
I love my PureGrit 2s, so obviously was eagerly awaiting the PureGrit 3s (the colors looked even better!). But then with just one run under my belt — they felt different. Not what I’d come to expect from my PureGrit 2s! Mind you — they are still nice shoes — but I really wanted to understand why they ‘felt’ different.
Feel ‘How they felt’- for this we could come up with a subjective description, use certain words e.g. smooth, springy, comfortable, flexible, stable etc.
And /or we could use a comfort scale i.e. 1-10. This fits with Nigg’s muscle tuning theory-to summarise; they got a number of runners to try 5 different shoes and score them in terms of comfort, they then got each runner to run in their most and least comfortable shoe; they found that the VO2 (measure of physiological efficiency) was lower (more efficient) in the most comfortable shoe.
So what I noticed straight away was that the Pronation profile in the 3s is different than the 2s! I’m able to pronate ‘more’ in the 2s than in the 3s. As we’ve seen from my prior blog post — being able to properly pronate means I don’t continually irritate my peroneals — which ultimately means that I get to run more!
Monitoring aches and pains-symptoms. Tim knew that if he continued then this would only increase, so he changed the shoe, the symptoms settled, so then he could run more; not everyone does that!
For Tim, he’s lucky, when he buys new shoes he can check the variables-if they are close to his current ideal shoe variables, then they’ll probably be fine, but if his pronation variable is reduced then he may have problems, but he also went on the feel/comfort and also his symptom levels.
Alang then said this:
It looks like I may have done it again.
The Pronation Excursion MP->TO on these Mizumo Wave Cursoris looks identical to the Brooks that did it to me last time.
Alang then said
This is what I would normally see in shoes that work well for me
I’m still trying to get my head round that variable-how it looks and what it means, but the bottom line is; like Tim, is you have a variable that’s sensitive, if its within certain values-your ok, if beyond a certain point your not.
Colortheory then said; I wish I could see the difference in my numbers. You may or may not remember that I hated the Triumph ISO 2, and it felt completely different than the Zealot, but the numbers didn't look much different.
He later said: For some contrasting stats, check out this morning's run in the Nike Free 5.0 2014. Huge max pronation velocity and pronation excursion, but it feels so smooth!
Foot strike is up there with the PureFlow 3, but no achilles problems.
Jai's comment: In that shoe The pronation excursion is much higher in this shoe? But using the feel comment it feels smooth and the symptom comment-the Achilles-no problems.
I can’t explain this, too many variables, but as it was with Tim, in your case pronation does not appear to be a bad thing, but good.
The other point to make and is another positive of the runscribe is that you can monitor the accumulative loads. It’s the total amount of loading that is key, not necessarily the number for each variable. A common comment on this forum is that the variables stay fairly conistant run on run when in the same shoes. So why be ok one week and not the next-what about the accumulative load, I bet its higher on the bad week.
It would be interesting to see what happens if colortheory wears the nike free for a number of consecutive runs, what would be the impact on the Achilles, because of the increased pronation excursion, will it lead to overload and symptoms? Obviously, if you start to feel symptoms, please back off-don’t let it progress. Lesson learned; if that happened would be that that of pronation of that amount is ok for a while but too much time at this amount creates damage, so maybe go for a shoe with some pronation but not that much.
I’m going to stop now