Saturday, June 1, 2013

The Biomechanical Model to Achieve Maximum Jump Height or Maximum Horizontal Distance 02

Hi all,

It's summer break for me.  Hurray!!  I will be posting regular updates to the blog from now until the end of August.  Thanks for your patience.  Here we go!

The Sum of Joint Linear Speeds Principle is the second fundamental Biomechanical principle included in the Biomechanical Model to Achieve Maximum Jump Height or Maximum Horizontal Distance.  This principle states that the jumper’s linear speed is the result of an optimal combination of individual joint linear speeds. The identification of this optimal combination of joint linear speeds is a skill that all individuals interested in understanding human movement must develop.

Click on "read more" to view my description of the Real-World Application of the Sum of Joint Linear Speeds principle to the Biomechanical Model to Achieve Maximum Jump Height or Maximum Horizontal Distance and to see a graphical representation the Sum of Joint Linear Speeds Principle.




For vertical and horizontal jumping, optimizing the combination of joint linear speeds caused by ankle plantar flexion, knee extension, and hip extension will result in the largest sum of joint
linear speeds and will maximize the jumper’s linear speed when leaving the ground.

Ankle plantar flexion will cause upward linear motion at the ankle joint and at every joint superior to the ankle. Knee extension will cause upward linear motion at the knee joint and at all joints
superior the knee. Thus, a combination of ankle plantar flexion and knee extension will sum to create greater linear motion at the knee and at all joints above the knee. Hip extension will cause upward linear motion at the hip joint and at all joints above the hip. Thus, a combination of ankle plantar flexion, knee extension, and hip extension will sum to create greater linear motion at the
hip and at all joints above the hip. This greater sum of linear motion will be the linear speed of the jumper’s center of mass when it leaves the ground

A graphical representation of the Sum of Joint Linear Speeds Principle is presented below.



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