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Progress Journals & Experimental Routines / Re: chasing athleticism
« on: January 11, 2013, 09:01:52 am »Nice one vag, let me plug in the numbers and see what comes out. I am starting to think it's better to work with time t=t* where t* is the time taken taken to reach the peak rather than total airtime. This is because I can get the exact frame where the peak occurs - which saves having to work out which frame is where one lands which is more subject to error.
The other thing i'm not positive about is - do you take the first frame F_0 when you are airborn? Or when the heel visibly begins to rise? Not sure.
First frame airborn, thats when the 'constant linear acceleration' begins, which is actually decelerating with constand acceleration factor -g. When heels start to rise, you are still building up your initial velocity, you are in the previous, undetermined, motion. 2 more general reccomendations:
-For dunks don't use the full hangtime formula, hangtime is distorted ( inflated ) from rim contact. Use that only for 'clean' jumps.
-The hangtime formula calculates the distance you traveled from toes off, what we call verticall is from heels down, you need to do that correction. You need to add that difference, for me its 5''
More info here : http://www.adarq.org/strength-power-reactivity-speed-discussion/about-the-hangtime-based-vertical-jump-calculators/msg2158/#msg2158 , more analysis at the youtube video description.
