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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Contraction at psychology-glossary.com■■■■■
"Contraction" refers to the shortening and tightening of a muscle, typically as a result of nerve stimulation. . . . Read More
Anaerobic at psychology-glossary.com■■■■
Anaerobic term used to refer to "without oxygen". In the psychology context, the term "anaerobic" is . . . Read More
Golgi tendon organs (GTO) at psychology-glossary.com■■■■
Golgi tendon organs (GTO) : Golgi tendon organ (GTOs) refer to a tension receptor located in series with . . . Read More
Muscle spindle at psychology-glossary.com■■■■
Muscle spindle is defined as a muscle stretch receptor oriented parallel to skeletal muscle fibersthe . . . Read More
Focal hand dystonia at psychology-glossary.com■■■■
Focal hand dystonia means (FHD) "musician’s cramp", refers to a condition in which the touch responses . . . Read More
Proprioception at psychology-glossary.com■■■■
Proprioception is the position of the body in extra-personal spaceneuromuscular facilitation technique . . . Read More
Twitch at psychology-glossary.com■■■■
In the psychological and medical area the term twitch describes the tension-generating response following . . . Read More
Type IIb fibers at psychology-glossary.com■■■■
Type IIb fibers refer to fibers that have a relatively small number of mitochondria, a limited capacity . . . Read More
Acetycholine at psychology-glossary.com■■■■
Acetycholine refers to a neurotransmitter involved in REM sleep, that plays a role in learning, memory, . . . Read More
Proprioceptor at psychology-glossary.com■■■■
Proprioceptor is a receptor that is sensitive to the position and movement of a part of the body. Proprioceptors . . . Read More