Time under contraction is not directly measured in a typical weight training program. Most people really don't even think about the number of seconds a given muscle is forced to work. Indirectly, ...

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.

If you enjoyed this article, I’d like to ask for your support. Scientific American has served as an advocate for science and industry for 180 years, and right now may be the most critical moment in ...

New study identifies how loss of mitochondrial protein MICU1 disrupts calcium balance and causes muscle atrophy and weakness. When we exercise, our muscles can become fatigued, sore and even damaged ...

For more than 30 years, scientists have studied how the myogenic determination gene number 1 (MYOD) protein binds DNA to modify the gene expression of muscle stem cells. Similar to the instant kung fu ...

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 ...

Skeletal muscle is the type of muscle that controls movement. Problems with these muscles can be minor, life-threatening, or ongoing problems that make it hard to perform basic daily activities.

Whether you want to achieve or avoid a muscular look, you should know how muscle changes your body for the better. Not everybody has the same reaction to noticing a new muscle pop up on their body.

When looking to gain muscle, it’s no secret that exercise and proper nutrition are key. Additionally, numerous factors contribute to the rate of muscle gain, including your training experience, sex, ...

There are various ways to estimate muscle mass percentage. These include using medical equipment, calculating body fat percentage, and measuring certain areas of the body. Maintaining a healthy ...