Your back and biceps make a perfect pairing, as pulling exercises naturally recruit your posterior chain — including the back muscles — and the biceps, which act as synergistic muscles that ...

These are called synergist muscles, and help the primary mover to achieve motion. Next, there are two types of contraction — isometric and isotonic.

These are called synergist muscles, and help the primary mover to achieve motion. Next, there are two types of contraction — isometric and isotonic.