tuck jump Standing jumps emphasize what components of jumping? horizontal or vertical components Standing jumps are _ efforts *with or without* recovery between reps? maximal with Examples of standing jumps -vertical jump vertical without When's the amortization phase of the a jump in place? the time between jumps Examples of jumps in place -squat jump depth jumps Jumps in place emphasize the _ component of jumping and are performed repeatedly, *with or without* rest in between. modes: upper Body plyo, lower body plyo, trunk plyo) How might a plyometric training program help endurance athletes such as runners or cyclers? it allows the muscles to produce more force with less energy Types of lower body plyometric drills include: -jumps in place Warm-upxt The mode of plyometric training is determined by what? the body region performing the given exercise the positions within the sport What must be included in the plyometric prescription to create a sound program ? 1. (high stretch rate -> greater muscle recruitment) This is the basis of plyometric exericise Stretch-shortening cycle What has the highest stretch rate: a static squat jump, a countermovement jump, an approach jump with several steps? the approach jump uses the quickest, most forceful eccentric phase the increase rate of stretch during the eccentric phase allows the highest increase in vertical jump height What must the strength coach analyze in the needs analysis for plyometric training? Same as in resistance training the stretch reflex will not increase muscle activity during the concentric phase The _ of MT stretch is vital to plyometric exercise rate This response potentiates/increases the activity in the AGONIST muscles -> concentric action happens increasing the force the muscle produces During the neurophysiological model of plyo, if the concentric muscle action doesn't happen immediately after the stretch (or if there is too long a time btwn stretch and concentric or if the movement is over too large a range), what happens? the potentiating ability of the stretch reflex is negated Stretch-shortening cycle phases, actions, and physiological events The stretch-shortening cycle employs the energy storage capabilities of the _ and stimulation of the _ reflex to facilitate a maximal increase in muscle recruitment over a minimal amount of time SEC stretch Phase one of the SSC involves preloading the _ muscle group(s) agonist As muscle spindles are stretched, they send a signal to the _ root of the spinal cord via Type _ afferent nerve fibers ventral 1a What is the amortization phase? What is it aka? the time between concentric and eccentric phaseĪka transition phase Neurophysiologcially, what happens during the amortization/transition phase? the type 1a afferent nerve fibers synapse with the alpha motor neutrons in the ventral root of the spinal cord, which is why there is a delay between the concentric and eccentric actions What phase of the SCC is most crucial in allowing greater power production? amortization or transition phase What happens if the amortization phase lasts too long? -the energy stored during the eccentric phase will be dissipated as heat During plyo, ms spindles are stimulated by rapid stretch -> reflexive muscle actionĢ. It is likely that both contribute to the increased production of force What happens during the neurophysiological model of plyometric exercise? 1. involuntary external These are proprioceptive organs that are sensitive to the rate and magnitude of a stretch when a quick stretch is detected, muscular activity reflexively increases Muscle spindles This is a change in the force-velocity characteristics of the muscle's contractile components caused by stretch Potentiation Which model contributed most to plyometric exercise: Neurophysiological or mechanical? The degree to which each model contributes remains unclear. The stretch reflex is the body's _ response to an _ stimulus that stretches the muscles.
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