To reiterate some of his most interesting feats of strength from the video below: 1  Leeâs striking speed from three feet with his hands down by his side reached five hundredths of a second. 2  His combat movements were at times too fast to be captured on film for clear slow motion replay during that time.
Muscles of Respiration. During quiet breathing, the predominant muscle of respiration is the diaphragm. As it contracts, pleural pressure drops, which lowers the alveolar pressure, and draws air in down the pressure gradient from mouth to alveoli.
1 ATP is required for muscle contraction, and four sources are available to muscle fibers: free ATP, phosphocreatine, glycolysis and cellular respiration.  A small amount of free ATP is available in the muscle for immediate use.