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29 Cards in this Set

  • Front
  • Back

Plyometric Exercises

Activities that enable a muscle to reach maximal force in the shortest possible time
Stretch-Shortening Cycle (SSC)
Quick, powerful movement using

Pre-stretch (counter-movement) using elastic components of muscle and tendon

Using the stretch reflex
Power
Force-speed relationship
Mechanical Model of Plyometric Training
Elastic energy in Musculotendinous components increase with rapid stretch and the stored
Series Elastic Component (SEC)
Workhorse of plyometric exercises

Tendons constitute majority of the SEC

When stretched, acts as a spring
Potentiation
Change in the Force-Velocity characteristics

Of the Muscle's contractile components

Caused by stretch of the concentric muscle action use of the Stretch Reflex
Stretch Reflex (Plyometrics)
Body's involuntary response to an External stimulus that stretches the muscles
Muscle Spindles
Proprioceptive organs that are sensitive to the rate and magnitude of a stretch

When quick stretch is detected
3 Phases of the Stretch-Shortening Cycle (SSC)
1. Eccentric Phase

2. Amortization

3. Concentric Phase
Eccentric Phase
Involves preloading the Agonist muscles

SEC stores elastic E+

Muscle Spindles are stimulated
Amortization
AKA. Transition

End of the Eccentric Phase

Initiation of the Concentric Muscle Action
Concentric Phase
Body's response to Eccentric and Amortization phase

E+ stored in the SEC during Eccentric phase used to Increase the Force of the subsequent movement

or dissipated as heat
Rate of Stretch in Plyometric training
High Stretch Rate results in Greater Muscles Recruitment and activity
Mode of Plyometric Training
Determined by the body region performing the given exercises
Types of Lower Body Plyometric Exercises
Jumps in Place, Standing Jumps, Multiple Hops and Jumps, Bounds, Box Drills, Depth Jumps
Upper Body Plyometric Exercises
Med-Ball Throws, catches, and several Push-ups
Plyometric Intensity
Amount of stress placed on involved muscles, connective tissues, and joints

Determined by the type of drill used
Plyometric Frequency
Number of sessions per week

~1-3
Plyometric Rest
1:5 - 1:10
Plyometric Volume
Number of Foot Contacts

Or

Distance

Upper Body: Number of Throws/Catches
Plyometric Program Length
6-10 weeks
Plyometric Warmups
Normal as resistance

Marching, Jogging, Skipping, Footwork, Lunging
Adolescent Plyometric Training
Under proper supervision

Appropriate Program

Kids CAN perform plyometrics (except depth jumps/ high intensity)
Masters Plyometric Training
Same as adults

pay attention to previous injuries
Complex Training
Combination of High-Intensity Resistance training

Followed by plyometrics

Gains in muscular power
Plyometrics and Aerobic Training
Do plyometrics first
Pre-Strength Requirements for Plyometrics
Lower Body: 1RM Squat 1.5 times BW

Upper Body: 1RM Bench Press at least BW (large athlete), 1.5 times BW (small athlete)
Balance
Maintenance of a position without moving for a given period of time
Landing Surface of Plyometrics
Adequate

Shock-Absorbing

Grass, suspended floor, rubber mat