Recent content by tom122079

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    Determining Vertical Jump Height from Average Velocity

    There are a couple of issues with this method. First, as mentioned before it is very easy to cheat the test, and even when not attempting to cheat the results can be inconsistent. Second, we do a lot of "weighted jump squats" which are basically a vertical jump with additional weight held in...
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    Determining Vertical Jump Height from Average Velocity

    Well, I tried attaching the accelerometer to the ankle and the results were promising. The average velocities were much less than those recorded with the accelerometer attached at the hip. Over the course of 2 weeks the athletes performed jumps with weights in their hands. The mechanics of...
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    Determining Vertical Jump Height from Average Velocity

    Those are both good ideas. I am going to try out Idea #1 today. It's so simple that I think it should work. It will still take into account a small amount of the time that the athlete is on the ground as the ankle extends, but should be much more accurate than attaching the accelerometer at...
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    Determining Vertical Jump Height from Average Velocity

    That's a newer model than the one I have. I have the Tendo Powerlyzer which only gives the average velocity and average power. Unfortunately it does not give me a graph. Any ideas?
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    Determining Vertical Jump Height from Average Velocity

    Here is the link to the product: tendosport.com/index.php?file=fitrodyne&checkproducts=do (you'll have to add in the "www" since I am not allowed to post url's due to my small number of posts on this board) You can also check out the manual there. To my knowledge there is no way to get...
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    Determining Vertical Jump Height from Average Velocity

    Yes, the accelerometer starts when the person is on the floor as soon as they begin their upward movement. With this is mind is it necessary to come up with some approximation of the initial instantaneous velocity upon leaving the floor? Is there any reliable way of doing this with the...
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    Determining Vertical Jump Height from Average Velocity

    I am a coach for athletes in various sports and have a problem that I can't figure out, but I'm hoping will be easy for someone here. I am looking to determine the height of a vertical jump from some limited information via an accelerometer. The accelerometer is attached near the center of...
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