
Fitness Theory and Practice. CrossFit's rationale & foundations. Who is fit? What is fitness? 

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10092013, 01:13 AM  #1 
Member

an equation for fitness
is there an equation (or an algorithm) for overall fitness?
something like  number of reps x duration of time x weight used/ persons body weight ? i'm keen to find something that would allow me to compare on an index different individuals overall fitness (at least based on the above variables) that's a little better than 'whats your Rx'd Fran time' i know there's an equation that exists for powerlifting (not that i can remember what it is) 
10092013, 01:25 AM  #2 
Member

Re: an equation for fitness
Doubt that there is, since there really isn't a universal definition for what "fitness" is in the first place.
 Mark 
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10092013, 05:26 AM  #3 
Banned

Re: an equation for fitness
Too many variables to solve for one number.
Powerlifting and weightlifting have Sinclair formulas and the like because those formulas only deal with two variables  bodyweight and weight lifted. When you ask somebody simply what their PRs are, everybody will have a different choice of which ones to tell you. For instance, I'd probably tell you my weightlifting total and running/rowing numbers. Somebody else might tell you their Fran/Diane/Elizabeth time. A third might tell you their Olympicdistance triathlon time. All of these are completely different metrics that I don't think can be reconciled together. 
10092013, 05:55 AM  #4 
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Re: an equation for fitness

10092013, 10:15 AM  #5 
Member

Re: an equation for fitness
http://library.crossfit.com/free/pdf...012013SDy.pdf (wfs)
Check out page 25 on. Basically, you take all of your workouts  graph the power you used [ (weight used*distance moved)/time action performed ] on the yaxis, and the time it took on the xaxis. You can do this with all the workouts you do Fran, 5k, etc... plot them on the graph and you will come up with the curve. Everything under the curve is your work capacity. The greatest volume of work should best discribe the overall fitness, according to CrossFit. 
10092013, 12:19 PM  #6  
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Re: an equation for fitness
Quote:


10092013, 12:44 PM  #7 
Member

Re: an equation for fitness
I sure hope the OP isn't planning to use this to in some way argue that he is more fit than someone else.
 Mark 
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10092013, 01:01 PM  #8 
Affiliate

Re: an equation for fitness
No. That's why Glassman created CrossFit so we can use that to see who is the fittest. I'm being sarcastic, guys. Don't kill me.

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10092013, 01:02 PM  #9 
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Re: an equation for fitness

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10092013, 01:23 PM  #10 
Member

Re: an equation for fitness
I think it would be too hard to use math to say who is more fit than another since there are too many definitions of "fitness" but you could probably use an equation to quantify your own fitness. Obviously you could just use the time for specific WODs to see if you are improving but there could be a way to set it up to see what you need to improve...although I have no idea what it would be. For example, if your variables measure strength, speed and time, maybe you could set it up to show where you may be lacking in a specific area. Again, I have no idea how to do it but maybe this can get someone thinking of a way to do it.

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