Answer:
Muscle contraction is the activation of tension-generating sites within muscle fibers. In physiology, muscle contraction does not necessarily mean muscle shortening because muscle tension can be produced without changes in muscle length, such as by holding a heavy book or a dumbbell at the same position. The termination of muscle contraction is followed by muscle relaxation, which is a return of the muscle fibers to their low tension-generating state.
Explanation:
Well you could die or not i teke prescription meds that are not for me well buts itf for somthing wrong with me but whats the possible answers
Regular exercise helps make us more alert and energetic, by releasing endorphins which is a chemical that improves our mood.
9 weeks is the answer ik health :D
