POWER- OTHER

Question 1

plyometrics scientific reasoning

Answer 1

-mechanical model
-neurophysiological model

^these add power because our muscle spindle is causing a stretch reflex where we get added contraction of that muscle + our muscle has kinetic energy basically from stretching itself out

Question 2

mechanical model

Answer 2

-elastic energy in musculotendinous components is increased with rapid stretch then restored
-when the stretch is immediately followed by concentric contraction, the stored elastic energy is released in form of kinetic energy
-series elastic component (SEC) is the workhouse of plyometrics
-SEC contains tendons, muscles, + other CT
-think of sprint or rubber band when thinking about mechanical model

Question 3

neurophysiological model

Answer 3

-involves potentiation (change in force-velocity characteristics of muscle’s contractile components caused by stretch)
-stretch reflex is the body’s involuntary response to external stimulus that stretches the muscles (muscle spindle activity)
-muscle spindle activation is increased during eccentric component
-plyometrics is most likely result of both components

Question 4

heavy resistance benefit

Answer 4

increases overall force production shifting the force velocity curve to the right
-power increases as a result

Question 5

ballistic benefit

Answer 5

causes rate coding increases, muscle recruitment patterns change, muscle synchronization improvements
-characterized by continual acceleration throughout concentric rather than slowing to a stop before returning to start position

Question 6

olympic benefit

Answer 6

causes combination of improvements seen from resistance + ballistic training

Question 7

plyometrics benefit

Answer 7

improves the storage + utilization of elastic energy, interactions of contractile + elastic elements, potentiation of contractile + elastic filaments, increases stretch reflexes produced by muscle spindles
-amortization: pause between phase 1 + 2; most important aspect of plyometrics; amortization should be as SHORT as possible

Question 8

how to calculate volume for plyometrics

Answer 8

volume is measured by foot contacts
-ex: box jump
-any time you have impact on the ground it is a foot contact; if it’s a 1 legged plyometric then you only get 1 foot contact per rep; if it’s a double-legged then you must double the foot contacts

**ex: 3x8 exercise landing on 2 feet -> this is 48 foot contacts for volume