The deltoid muscle is primarily responsible for arm rotation ... Your range of motion might be quite small, but don't force the movement. Aim for 3 sets of 10 before your training session or ...

The researchers found that both dumbbell and cable lateral raises produced small to medium increases in lateral deltoid muscle thickness. Percentage changes ranged from 3.3 per cent to 4.6 per cent.

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 ...

Lateral raises work the shoulder muscles, known as deltoids ... slowly raise both arms outwards. 3. Make sure you keep your arms straight with a slight bend in each elbow, and stop when they ...