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Target Muscle Stretches & Heavy Resistance Exercise
To identify first the effect stretching has on the individual muscle fiber would be appropriate. The contractile proteins inside a muscle fiber are called myofibrils. These structural proteins traverse the entire length of the muscle fiber and are comprised of actin & myosin. These long thin stringy components comprise the entire myofibril components. When a nerve impulse stimulates a fiber to contract, these tiny actin and myosin slide (pull) into one another forcefully, resulting in a contractile shortening of the host myofibril and consequently the entire working muscle fiber. When contractions are intense, an occurrence known as Jamming or Tetanus results. This simply means that the pulling together of the individual actin & myosin filaments have been so intense as to cause damage to them. Natural post-contraction relaxation following jamming may sometimes be insufficient to allow the damaged actin & myosin to completely separate. In other words, actin & myosin may still be partially intertwined, in the absence of stretching, in the beginning of the following set causing premature failure. Stretching between heavy sets effectively pulls these damaged (jammed) actin & myosin fully apart allowing for greater recovery and full contractions in following sets. These between-set target-muscle stretches need not be extremely intense or of long duration to accomplish the above desirable separation of contractile proteins.
Stretching between light sets is clearly not as important for immediate performance enhancement since jamming is rarely a concern at lower contractile thresholds. However, fully stretched post-workout muscles, regardless of exercise intensity and/or the number of repetitions performed, have been shown to recover more efficiently and with a lesser incidence of Delayed Onset Muscle Soreness. In any case, post-workout stretching and between workout stretching results in recovery enhancement no matter what goal oriented resistance exercise is prescribed.
bron http://www.nfpt.com
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To identify first the effect stretching has on the individual muscle fiber would be appropriate. The contractile proteins inside a muscle fiber are called myofibrils. These structural proteins traverse the entire length of the muscle fiber and are comprised of actin & myosin. These long thin stringy components comprise the entire myofibril components. When a nerve impulse stimulates a fiber to contract, these tiny actin and myosin slide (pull) into one another forcefully, resulting in a contractile shortening of the host myofibril and consequently the entire working muscle fiber. When contractions are intense, an occurrence known as Jamming or Tetanus results. This simply means that the pulling together of the individual actin & myosin filaments have been so intense as to cause damage to them. Natural post-contraction relaxation following jamming may sometimes be insufficient to allow the damaged actin & myosin to completely separate. In other words, actin & myosin may still be partially intertwined, in the absence of stretching, in the beginning of the following set causing premature failure. Stretching between heavy sets effectively pulls these damaged (jammed) actin & myosin fully apart allowing for greater recovery and full contractions in following sets. These between-set target-muscle stretches need not be extremely intense or of long duration to accomplish the above desirable separation of contractile proteins.
Stretching between light sets is clearly not as important for immediate performance enhancement since jamming is rarely a concern at lower contractile thresholds. However, fully stretched post-workout muscles, regardless of exercise intensity and/or the number of repetitions performed, have been shown to recover more efficiently and with a lesser incidence of Delayed Onset Muscle Soreness. In any case, post-workout stretching and between workout stretching results in recovery enhancement no matter what goal oriented resistance exercise is prescribed.
bron http://www.nfpt.com
Meningen op dit artikel?