And because there are more people doing it part time, where they donât need to make much of a profit in order to pay their bills, itâs going to be harder and harder for people in the industry who do rely upon photography to pay their bills to do so.
The contraction period, or contraction. time, is the time it takes the muscle to. reach its peak contraction after the latent. period. The relaxation period is the time. the muscle takes to return to resting. tension after reaching its peak. contraction. Muscles rely on two physiological. principles to bring about productive. motion: recruitment and summation.
When muscles contract, the muscle fibers shorten, increasing tension in the muscle. When the contraction is completed, the muscle fibers lengthen and decrease tension. During a muscle cramp, however, the muscle fibers remain shortened and are unable to lengthen due to fatigue or improper hydration and nutrition.acefit/healthy-living-article/60/1478/why-do-muscles-tighten-up Tight muscles are not only frustrating and painful, but can also limit movement. Worst of all, they can make it harder to stick to your exercise program.