September 30, 2013
A lever is the simplest of machines, which utilizes a rigid bar to rotate around a fixed pivot point called a fulcrum in order to exert force on an object (load). If the resistance or load exceeds the strength of the bar, the bar will break. Biomechanically speaking, the arm is a bar, and when the fulcrum is at or above the joint, breakage can easily occur.
January 15, 2009
The New Year has arrived. “What are you committed to?” asks Seabourne. “You might find yourself searching for an answer. Although you may not be preparing for a big race or have any clearly defined fitness goals--or any goals--you are still committed.”