Same runner, pre and post running instruction. INCORRECT, INEFFICIENT, INJURY PRONE ON LEFT: Reaching, braking, scissor kicking, heel strike on left. CORRECT, EFFICIENT, PERFORMANCE ON RIGHT: Butt kick running with forefoot strike on right.
Lasting effects of eccentric vs. concentric training protocols
The three main muscle actions of the body include concentric, eccentric and isometric contractions. Concentric muscle actions involve force production as the muscle fibers shorten, as in the upward phase of the squat (knee and hip extension). Eccentric muscle actions involve force production as the muscle fibers lengthen, as in the downward phase of the squat (knee and hip flexion). Isometric muscle actions involve ...
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