The waist rises because of the hop during the rotation of the leg to keep you parallel to the ground. If it wasn't for the hop the waist would be rotated down to the ground just like gravity rotates an off balance pole.
At a steady stage of a run your feet drop as little ahead of the waist as you can keep it landing. At a slowdown stage the feet land far out front for gravity to pull you back. A steady stage has two slowdown phases. One slowdown when you land ahead of the waist momentum continues you forward. One speedup phase of the stride when the waist passes the foot. Second slowdown is air time with both feet off the ground.
The upper body tilt is not a lean for speed. Only the waist needs to lean for speed. Michael Johnson broke sprint records with a backward slanted full upper body, but his waist was slanted forward. The waist has the full weight of the body.
Exactly! The object is to bring the feet forward as fast as you can so you can shorten the stride to stay far off balance for more steps. That is the only way you get to a faster steady pace. Lifting the knees wastes time and energy. Forget about the knees and think of the feet coming forward low for less impact and more speed. The knees come forward first anyway because the feet go farther back.
The waist rises because of the hop during the rotation of the leg to keep you parallel to the ground. If it wasn't for the hop the waist would be rotated down to the ground just like gravity rotates an off balance pole.
JackNirenstein 4 months ago
At a steady stage of a run your feet drop as little ahead of the waist as you can keep it landing. At a slowdown stage the feet land far out front for gravity to pull you back. A steady stage has two slowdown phases. One slowdown when you land ahead of the waist momentum continues you forward. One speedup phase of the stride when the waist passes the foot. Second slowdown is air time with both feet off the ground.
JackNirenstein 4 months ago
The upper body tilt is not a lean for speed. Only the waist needs to lean for speed. Michael Johnson broke sprint records with a backward slanted full upper body, but his waist was slanted forward. The waist has the full weight of the body.
JackNirenstein 4 months ago
@JackNirenstein wow i never thought about i that way.....so in a sense what i should be doing is forcing my waist downward almost at an angle?
ruben3ruru 4 months ago
Exactly! The object is to bring the feet forward as fast as you can so you can shorten the stride to stay far off balance for more steps. That is the only way you get to a faster steady pace. Lifting the knees wastes time and energy. Forget about the knees and think of the feet coming forward low for less impact and more speed. The knees come forward first anyway because the feet go farther back.
JackNirenstein 4 months ago
@JackNirenstein but doesnt driving your knees up make your stride longer? and also should i lean forward as much as i can?
ruben3ruru 4 months ago
so what you are sayin is that when i sprint i shouldnt try to drive my knees upward while im running?
ruben3ruru 4 months ago