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.
The first is the muscle spindles. Located within the muscle fibres they monitor changes in muscle length. The stretch reflex is the bodys involuntary response to an external stimulus that stretches the muscle (5) and causes a reflexive increase in muscular activity. It is the muscle spindles that activate this response. When stretching, it is best to avoid this activating the muscle spindles and the stretch-reflex response, as it will limit motion. Static stretching does not elicit the muscle spindles, allowing muscles to relax and achieve a greater stretch. The other important proprioceptors are the golgi tendon organs (GTO).