Interval Training
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Interval training is a concept and a practice wherein a person works out at a medium to high intensity for a specified period of time or distance and then reduces the exercise intensity for an equal period of time or distance. Such an exercise regimen several sets at varying levels of exercise intensity. Advocates of interval training contend that the greatest changes in body physiology occur during the high intensity intervals, as the body responds to the applied stress. The increased physiological benefits that result from the high intensity exercise intervals produce training benefits equal to those produced by a steady or continuous lower-intensity training session that extends over a much longer time period than is required in an interval training session (11). A 1997 study found, however, that no increased benefits accrued from higher intensity training at intervals (1). This debate holds relevance for both high-performance athletes and ordinary people desiring to maintain acceptable levels of fitness.A 1997 study found that splitting training tasks into intervals or repetitions will increase the amount of oxygen consumed and needed to be repaid after each unit when compared to performing the same distance at the same workload in a continuous or steady exercise regimen. Intermittent, or interval, training tasks were found to place a greater load on the oxygen transport system than do continuous tasks (1). The
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laments reach out directly toward the thin filaments (8).
The center of each I-band is marked by a structure named the Z-line, which marks the boundary of the sarcomere. The function of the Z-line is to connect the ends of thin filaments from one sarcomere to those of the next one in line. The Z-lines also have cross connections that keep the thin filaments "in register with each other in a lateral direction. In the center region of the A-band, where the thin filaments of the I-band have not penetrated, is a somewhat lighter region called the H-zone (the M-line runs through the center of the H-zone, since the filament overlap is symmetrical)" (8:537).
During the process of contraction, neither the thick nor the thin filaments change in length. All of the change in the length of the muscle is accounted for by a greater or lesser degree of overlap between the thick and thin filaments. Thus, when a muscle shortens, the length of the A-band stays the same while that of the I-band decreases. The thin filaments themselves do not change length. Shortening of the muscle is brought about a cyclic motion of the crossbridges, "in which they successively attach to the closest available thin filament site, change their shape, then let
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Some common words found in the essay are:
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Approximate Word count = 5492
Approximate Pages = 22 (250 words per page)
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