Answer:
A muscle strain, or pulled muscle, occurs when your muscle is overstretched or torn. This usually occurs as a result of fatigue, overuse, or improper use of a muscle. Strains can happen in any muscle, but they're most common in your lower back, neck, shoulder, and hamstring, which is the muscle behind your thigh.
Poor diet, hormones, or even eating spinach
I belive it is <span>Agonist/ Antagonist
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The correct answer would be 2:big. You shouldn't set an impossible goal, or else you will never allow yourself to succeed.
