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I was trying to identify which athlete does more work per rep/stride. I am trying to understand how a marathon runner can run sub 6 minute miles under aerobic conditions. To me this seems like a high intensity to I wanted to figure out who was doing more work, producing more force, or if you can think of a better measurement to compare the two.

My thoughts on how to calculate: w=f*d, f=m*a, p=w/t

Weightlifter performing dead lift: w=118kg * 9.8m/s/s*1 m = (correct) 1156.4 N

p=1156.4N/3s 386.467 W

I had some trouble with the runner because I was unsure of how to calculate w. would it be the runners weight (w in kg) * gravity * stride length, or would gravity have to be a component because they are not traveling say 6 feet straight up, but rather a matter of inches up and 6 feet in distance. stride length is about 1.17 times the height of the runner who is 6 feet, and lets say they elevate .15 meters. Lets also assume their stride takes .35s ( this is not unreasonable, I think I read 10k runners running at 180-190 strides per minute)

my experimental runner: 70kg, stride length 12.85 m, distance off the ground while running .15m, .35s per stride

If anyone has some input on how to solve the work of the runner I would appreciate it, or if you see some problems in my logic. (this is not homework, just fun work)

My thoughts on how to calculate: w=f*d, f=m*a, p=w/t

Weightlifter performing dead lift: w=118kg * 9.8m/s/s*1 m = (correct) 1156.4 N

p=1156.4N/3s 386.467 W

I had some trouble with the runner because I was unsure of how to calculate w. would it be the runners weight (w in kg) * gravity * stride length, or would gravity have to be a component because they are not traveling say 6 feet straight up, but rather a matter of inches up and 6 feet in distance. stride length is about 1.17 times the height of the runner who is 6 feet, and lets say they elevate .15 meters. Lets also assume their stride takes .35s ( this is not unreasonable, I think I read 10k runners running at 180-190 strides per minute)

my experimental runner: 70kg, stride length 12.85 m, distance off the ground while running .15m, .35s per stride

If anyone has some input on how to solve the work of the runner I would appreciate it, or if you see some problems in my logic. (this is not homework, just fun work)

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