The traditional deadlift is more than a mere test of strength. Few exercises engage as many muscle groups in a single movement. The sheer muscle activation that occurs in the glutes, hamstrings, ...

Flexion (Sagittal Plane): A decrease in angle between two body parts. In the spine, flexion is bending forward. - Muscles: Rectus abdominis, External obliques, Internal obliques, Psoas (if hips and ...