Strength of muscle work-Muscle contraction
To raise strength of the muscle work is the muscle contraction intensely raised?
Expert
Raise in strength of muscle work is not accomplished by raise in the intensity of stimulation of each muscle fiber. Muscle fiber obeys an all-or-nothing rule, that is, its contraction strength is only one and can’t be raised.
When the body requires raise the strength of muscle work a phenomenon recognized as spatial summation takes place: new muscle fibers are recruited in addition to fibers already in action. So strength of muscle contraction rises only when the number of the active muscle cells raises.
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