Chapter 11
What happens to muscle structure and strength during weightlessness in space? Musculoskeletal Experiments describes NASA's spacelab experiments on the effects of weightlessness on muscle fiber function, how microgravity affects muscle contraction, and how muscle to counteract muscle atropy in outer space. This site provides the student a thoroughly enjoyable way to learn more about muscle structure and function.
How physical exercise can help in weight control is the subject of Physical Activity and Weight Control, a website from NIH. This site includes information on how exercise burns calories, the number of calories represented by a pound of fat, the health benefits of physical activity aside from weight control, and suggests the amount and intensity of exercise needed.
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