That will help ensure you build balanced strength and muscle ... the upper arm, making it an extension-focused movement. If you’re ever unsure, keep this simple maxim in mind: flexion is forward ...

your lower arm consists of the muscles under your elbow, also known as your forearm. This region consists of 20 muscles which can be categorized as either: Flexor muscles help with bending ...

Deltoid Abduction of the shoulder (moving the arm outwards and away from the body) Outward arm action in a jumping jack Rotator cuffs A group of stabilising muscles of the shoulder which helps to ...

Background Most studies of exercise-induced muscle injury have focussed on eccentric contractions, which are known to produce damage and delayed soreness. It is less well known that isometric ...