Accessory muscle breathing means using muscles other than those typically used for breathing to take in and expel air. One example is the subclavius — between the collarbone and the top rib — which ...

Muscle contraction is the tightening, shortening, or lengthening of muscles when you do some activity. It can happen when you hold or pick up something, or when you stretch or exercise with weights.

When performing a strength training program, people may find it helpful to train certain muscle groups together. This can help prevent overtraining and maximize results. The Dietary Guidelines for ...