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Jack Nirenstein -- Health & Fitness and Sports Expert -- Irrefutable and Observable
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Jack Nirenstein -- Health & Fitness and Sports Expert -- Irrefutable and Observable
Myrtle Beach, SC United States
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Jack Nirenstein
Myrtle Beach, SC
United States
Contact Phone: 843-903-1529

Other experts on these topics
1. Coaching
2. Family Health
3. Walking
4. Art of Running
5. Championship Running
6. Competitive Running
7. Distance Running
8. Gravity Running
9. Marathon Running


Scientists looked at the same running stride pictures that I looked at and they did not understand what was obvious to me. If these objects were statues they would be pulled forward and down to the ground ahead of their foot/feet. These objects are alive so they jump straight up for gravity to pull them forward instead of down. No object, animate or inanimate can stand still ahead of a vertical line of balance.

Momentum from a previous stride brings the upper body?s center of balance from behind the foot to directly over the foot. That is the slowdown phase of the stride. Momentum and gravity starts speeding the upper body?s center of balance from directly over the foot to the takeoff point ahead of the foot. The longer speedup phase combining gravity?s pull with momentum make the total ground time off balance. The greater weight ahead of the foot and the lift make gravity keep pulling you straight ahead with every stride. The stride spreads out with speed while you try to keep it short. The above picture and text applies to an even stride. To reach the even pace you need to increase speed with each step. You speed up by making the ground time have no slowdown phase. The feet land slightly behind the upper body?s center of balance and stay on the ground to take off farther behind. To slow down and also stop the feet drop to the ground far out front and take off the ground less out front. Tilting the upper body has no effect on speed. You can see by where you drop your feet for speedup and slowdown that gravity moves you in the direction of the lean caused by the slant of the leg and not by a tilt of the upper body. Looking at the even stride above you can see why the scientists missed seeing it is off balance.
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