Stretch Reflex
Within the Triceps, and all muscles, there is a special muscle fibre known as the annulo-spiral receptor. This receptor is sensitive to the rate and extent the Triceps is being stretched.
Stretch reflex - A protective, involuntary nerve reaction that causes muscles to contract. Bouncing or overstretching can trigger the reflex in which muscles are trying to protect themselves from damage.
Health Tips ...
Stretch reflex: The reflex contraction of a muscle when an attached tendon is pulled
Striations: Thin grooves or lines.
Stroke: The rupture of a blood vessel which leads to lack of oxygen to the brain and causes loss of consciousness.
The Stretch Reflex
The Lengthening Reaction: (next subsection)
Proprioceptors: (previous subsection)
What Happens When You Stretch: (beginning of section) ...
stretch reflex,
autogenic and reciprocal inhibition,
muscle action (concentric; eccentric; isometric),
PNF stretching techniques,
PNF strengthening techniques,
and rhythmic initiation and stabilization.
Stretch reflex, Golgi reflex and reciprocal enervation may be involved in the muscular releases, but these occur on a cellular level and expand out physically.
Anytime you stretch a muscle, the stretch reflex immediately contracts (tightens) the muscle to protect it against injury.
It may instead cause them to tighten up by repeatedly activating the stretch reflex (When the muscle is stretched, ...
For the Bench Press, the board press is much superior to the power rack pin press because you must lower the weight, establishing the right groove, staying tight, and developing some stretch reflex.
Never bounce as you hold a stretch, be-cause this will acti-vate your stretch reflex (an automatic, protective contrac-tion).
Stop and hold each stretch for 10 to 20 seconds without bouncing. Bouncing activates a muscle's stretch reflex, making it tighter and shorter. This may cause tiny tears in the muscle, resulting in injury and soreness.
Research has corroborated the PNF approach that overall flexibility is developed most effectively by full range strength training, some of which may even include strong recruitment of the stretch reflex.
This stretching is very important as it will improve your flexibility, more closely duplicate range of rotation needed in sports and trigger a stretch reflex which will force more muscle fibers to contract.
 See also: Muscle, Strength, Stretching, Exercise, Flexibility
  
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