Chapter 12: Plyometrics Exercises Flashcards
What’s another name for plyometrics?
Jump training
What are plyometrics?
Exercises exerting maximum force in a short time aimed at increasing muscular power
How do plyometrics increase muscular power?
By targeting the stretch-shortening cycle (SSC) of muscle contraction
A muscle is loaded eccentrically and then unloaded through a rapid, forceful concentric contraction, resulting in high levels of force generated quickly
What are the three phases of plyometric exercises?
Loading eccentric phase
Transitional amortization phase
Unloading concentric phase
What do the phases of the SSC provide?
They turn kinetic energy into potential energy and output
What is kinetic energy?
The work needed to accelerate a mass from a state of rest to a state of velocity
Also the energy an object has
What is potential energy?
The energy within an object created by its relative position to other objects
What is also known as the as the loading, preparatory, or countermovement phase?
Eccentric phase
A slower eccentric phase will result in _ potential energy than a faster eccentric phase
Less
What is the brief time between the eccentric phase and concentric muscle action?
The amortization phase
What is a coach’s goal during the amortization phase?
To minimize it and thus increase the power of the next phase
What is also known the unloading, shortening, or power-production performance phase?
The concentric phase
What does the concentric phase enhance and reuse for consecutive eccentric phase?
The summation and reuse of the potential energy and muscle stretch
This is why plyometrics are done in succession and the height or power produced increases with each consecutive repetition
What is the limiting factor with the speed of muscular exertion?
Neuromuscular efficiency and coordination
What prevents excessive muscle stretch or tension through inhibitory mechanisms?
The Golgi tendon organ
