Physical activity refers to any bodily movement produced by contraction of the skeletal muscles that results in energy expenditure, examples are walking, running,exercise, etc.

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Anaerobic at psychology-glossary.com■■■■
Anaerobic term used to refer to "without oxygen"; - - In the psychology context, the term "anaerobic" . . . Read More
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Contraction at psychology-glossary.com■■■
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