An Elite Sprinter's Stride, Analyzed Frame by Frame
He's airborne more than half the race. Ground contact: one tenth of a second. 257 steps per minute. We analyze an elite sprinter's stride point by point — ball-of-foot landing, knee drive, heel whip, shoulder counter-rotation — with a 3D avatar matched to the race footage, frame by frame.
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0:32 Heel vs Midfoot Landing — Same Runner, Same Speed 
0:51 150 vs 195 Steps Per Minute — Same Pace, What Changes? 
0:55 4:13 vs 2:06 Marathon — What Actually Changes? 
0:22 Shoulder Press: Delts or Triceps? 
0:28 Machine or Free Weights? Look From Above 
0:25 One Exercise Per Delt Head — Front, Side, Rear