Today for homework I read the article "What Happens When You Stretch," When you stretch, the muscle fiber is pulled out to its full length sacromere by sacromere, and then the connective tissue takes up the remaining slack. When this occurs, it helps to realign any disorganized fibers in the direction of the tension. This realignment is what helps rehabilitate scarred tissue back to health. Proprioceptors are nerve endings that relay all the information about the musculoskeletal system to
the central nervous system. They aide in the perception of one's own body position and movement. The proprioceptors related to stretching are located in the tendons and in the muscle fibers. There are two kinds of muscle fibers fibers: intrafusal muscle fibers and extrafusal muscle fibers.
When muscles contract, they produce tension at the point where the muscle is connected to the tendon. When the tension caused by stretching exceeds a certain threshold, it triggers the lengthening reaction which inhibits the muscles from contracting and causes them to relax. Another reason for holding a stretch for a prolonged period of time is to allow this lengthening reaction to occur, thus helping the stretched muscles to relax.
When an agonist contracts, in order to cause the desired motion it usually forces the antagonists to relax and this phenomenon is called the reciprocal inhibition. When stretching, it is easier to stretch a muscle that is relaxed than to stretch a muscle that is contracting. You want to relax any muscles used as synergists by the muscle you are trying yo stretch. For example, when you want to stretch your calf, you want to contract the shin muscles by flexing your foot.
The muscle spindle records the change in length (and how fast) and sends signals to the spine which convey this information. This triggers the stretch reflex which attempts to resist the change in muscle length by causing the stretched muscle to contract. Another reason for holding a stretch for a prolonged period of time, is so you can gradually train your stretch receptors to allow greater lengthening of the muscles.
The static component of the stretch reflex persists as long as the muscle is being stretched. The dynamic component of the stretch reflex (which can be very powerful) lasts for only a moment and is in response to the initial sudden increase in muscle length.
That is why when we are young it advised to play money bars which stretches out our arm muscles making us taller.
the central nervous system. They aide in the perception of one's own body position and movement. The proprioceptors related to stretching are located in the tendons and in the muscle fibers. There are two kinds of muscle fibers fibers: intrafusal muscle fibers and extrafusal muscle fibers.
When muscles contract, they produce tension at the point where the muscle is connected to the tendon. When the tension caused by stretching exceeds a certain threshold, it triggers the lengthening reaction which inhibits the muscles from contracting and causes them to relax. Another reason for holding a stretch for a prolonged period of time is to allow this lengthening reaction to occur, thus helping the stretched muscles to relax.
When an agonist contracts, in order to cause the desired motion it usually forces the antagonists to relax and this phenomenon is called the reciprocal inhibition. When stretching, it is easier to stretch a muscle that is relaxed than to stretch a muscle that is contracting. You want to relax any muscles used as synergists by the muscle you are trying yo stretch. For example, when you want to stretch your calf, you want to contract the shin muscles by flexing your foot.
The muscle spindle records the change in length (and how fast) and sends signals to the spine which convey this information. This triggers the stretch reflex which attempts to resist the change in muscle length by causing the stretched muscle to contract. Another reason for holding a stretch for a prolonged period of time, is so you can gradually train your stretch receptors to allow greater lengthening of the muscles.
The static component of the stretch reflex persists as long as the muscle is being stretched. The dynamic component of the stretch reflex (which can be very powerful) lasts for only a moment and is in response to the initial sudden increase in muscle length.
That is why when we are young it advised to play money bars which stretches out our arm muscles making us taller.
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