Positive Negative and tnBetween

There are three types of muscle "contractions": positive (sometimes referred to as concentric), negative (or eccentric), and static (also called isometric). In a positive contraction, the muscle's force overcomes the resistance posed by the weight and shortens to lift the weight. This is also known as the positive phase of the lift.

In the case of a negative contraction, the muscle is still exerting force, but it's not enough to overcome the resistance, so the weight is lowered as the muscle lengthens. This is the negative phase of a lift.

A static contraction occurs when there is no movement of the resistance or change in the joint angle. This can occur when you try to move an immovable object, such as pushing against a wall, or when the force exerted by the muscle is equal to the weight.

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