Introductory Problem One
Concentric muscle action is an action that describes the contraction that involves the shortening of a muscle. Examples of activities where the concentric muscle action is required include walking on level ground, picking up a weight and kicking a ball. The quadriceps and calfs are involved when walking on level ground and when kicking a ball. The biceps, deltoids and back muscles are involved when picking up a weight.
The eccentric muscle action is where a muscle elongates as it being stimulated in order to develop tension. Some of the activities that require eccentric muscle action are extending the elbow where the biceps branchii are ...
