The hamstrings are the agonist and the quadriceps are ... the upwards phase, the triceps are the agonist and contract concentrically to extend the elbow and the biceps are the antagonist.

Looking to add serious size to your arms fast? This workout is built around a high-intensity bicep and tricep superset ...

Walking builds muscles and delays muscle deterioration from aging. This article lists the specific muscle groups engaged ...

An advanced calisthenics move (that's a blend of bodyweight strength and gymnastics, for the unintiated: think push ups, pistol squats and pull ups and you've got the gist), the L-sit can be performed ...

It's the detail work that makes all the difference.