How does exercise and repetition relate?

Answer  Rep (repetition) is one complete motion of an exercise. A set is a group of consecutive repetitions. For example, you can say, “I did two sets of ten reps on the crunches” This means that you did ten consecutive crunches, rested, and then did another ten crunches.

Explanation:

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c)as speed changes, wavelength and frequency change.

everything changes!