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.
A muscle fiber contracts in an all-or-none fashion. There is a slight latent period that occurs between when the stimulus arrives at the muscle and when the muscle contracts. Muscles will add motor units to a contraction, increasing the overall force of contraction.When a person is fully at rest, none of her muscles are contracting.here is a slight latent period that occurs between when the stimulus arrives at the muscle and when the muscle contracts. Muscles will add motor units to a contraction, increasing the overall force of contraction. When a person is fully at rest, none of her muscles are contracting.