You burn more.The more you burn the more your muscles tear and come back tougher.
Isostatic stretching is a flexibility training which is in a advanced form. It should be performed with CAUTION. It is important to avoid isostatic stretches because they can disrupt muscle growth and it fatigue the muscles. Its recommended to do some warm up before doing these stretches honestly.
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Answer: Continuous repetition of the number
Explanation: