Triple Jumping
Entry posted by DavidStack
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Although I had to quit indoor track because of an ankle injury, I did learn a lot about the precision of triple jumping form from my coach. Previously, I had run my approach with my chest not perpendicular to the ground but slightly more forward and my knees did not move very high. With this form, my momentum (which points perpendicular from my chest) was pointed into the ground, preventing me from jumping as far as possible. My knees also needed tweaking, since a lot of the power from jumping comes from the knee drive. Because my knees moved little as I approached my jump, it was hard to suddenly rip my knee up when I took off, due to the conservation of momentum (it takes an external force to change the direction of my momentum, but if my momentum was already directed up and forward, that force would not be necessary). With a continued knee rise throughout my approach, I could develop a more fluid and powerful jump. While these adjustments to the approach slightly decreased my speed, they vastly improved my control and jumping power, greatly lengthening the distance I could jump.
This world class jumper displays this approach form, leading him to a record breaking jump:
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