muscles

"Science of NFL Football" is a 10-part video series funded by the National Science Foundation and produced in partnership with the National Football League. In this segment, NBC's Lester Holt looks at the physically demanding pre-season ritual of NFL training camp. Professor Douglas Casa, head of the Korey Stringer Institute at the University of Connecticut, and athletic trainers from the Pittsburgh Steelers explain what NFL players must do to stay hydrated and replenish the essential...

Dissection of a human body 02: the intrinsic muscles of the back (vertebral column, spinal meninges, spinal cord). Warning: content may be unsuitable for the faint hearted.

A Discovery Channel series segment of the science behind the superhuman strength displayed by body-builders and weight-lifters.

How do some humans achieve superhuman strength? From a series by the Discovery Channel.