When your elbows flex to a 90-degree angle ... pectoralis major, lower trapezius, and latissimus dorsi. It also activates the infraspinatus muscle in your rotator cuff better than the other ...

The trapezius muscle can act as a fixator when the biceps is flexing the elbow joint. The abdominals can act as fixators to stabilise the body for hip and knee movements. Preparation and execution ...