Its B. 13- i just took the test and i got it right.
Dos to prevent sway back posture. Sit deep in your chair, with your back straight and your chin facing ahead.train quad muscles with the correct exercises, such as half squats. Strengthen your lower abdominal muscles with leg lifts and reverse crunches.
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:
