MUSCLE PHYSIOLOGY

Detailed explanation-1: -Back in 1925, Hill defined 2 types of muscle contractions4: isometric (muscle length does not change during contraction) and isotonic. In this latter contraction, tension remains unchanged while the muscle’s length changes. There are 2 types of isotonic contractions: concentric and eccentric .

Detailed explanation-2: -Isometric contractions generate force without changing the length of the muscle.

Detailed explanation-3: -An isometric contraction is a muscle contraction without motion. Isometric contractions are used to stabilize a joint, such as when a weight is held at waist level neither raising nor lowering it. Dynamic contractions are muscle contractions with a fixed amount of weight.

Detailed explanation-4: -Isotonic means “same tension” (the weight on your muscles stays constant) while isometric means “same length” (your muscles do not get longer or shorter). It’s also important to know that you have the ability to make certain moves isotonic or isometric depending on your goals.

Detailed explanation-5: -Concentric contractions are when the tension in the muscle increases and the fibers shorten and contract. While isometric contractions are when you are making sure the angle of your joints do not change during the exercise, and the muscle does not shorten or lengthen. The final contraction is eccentric.