What electrical changes occur in muscles as they get tired? Student subjects hold their arms above their shoulders until they

Question

What electrical changes occur in muscles as they get tired? Student subjects hold their arms above their shoulders until they have to drop them. Meanwhile, the electrical activity in their arm muscles is measured. This is
an uncontrolled experiment.
an observational study.
matched pairs experiment.
a randomized comparative experiment.

Kunduz · Accepted Answer

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