Ground Reaction Force

A Ground Reaction Force (GRF) is a force produced by the ground of equal and opposite direction to a force created by a body in contact with the ground. Various sporting events utilise this force to maintain and improve specific movements, by powerfully pushing an extremity into the ground an equally powerful reaction force is emitted. An example of this can be seen within a basketball dunk, the player loads their legs and forcefully push into the ground, this results in a GRF which ripples through the body, launching them into the air. The greater the leg push, the greater the GRF.

Michael Jordan vs Dominique Wilkins: Dunk Contest

http://www.youtube.com/watch?v=nsD17Ux7_nM

References:

• Hume, Keogh and Reid. The Role of Biomechanics in Maximising Distance and Accuracy of Golf Shot. Sports Medicine, 2005, Volume 35, Issue 5, Pages 429-449.

Thanks,

Mitch