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Plyometrics
Therapeutic Exercise
35
Other
Undergraduate 3
03/23/2011

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Term
Plyometrics
Definition
Form of training that attempts to combine speed of movement with strength
Term
Contractile Components
Definition
Myofibrils
-Actively shorten or lengthen to produce motion
Term
Two Types of Non-Contractile Components
Definition
1)Series Elastic Component (SEC)
2)Parallel Elastic Component (PEC)
Term
SEC
Definition
Tendons, sheath, and sarcolemma
Term
PEC
Definition
Muscle's connective tissue
Term
Durring movement, what contracts with Eccentric activity?
Definition
CC: controls rate of elongation
SEC & PEC: offer resistance to the motion
Term
Three Phases durring plyometrics:
Definition
Eccentric, Amortization, Concetric
Term
Durring Eccentric phase:
Definition
Muscle actively lengthens. Slack taken out of muscle and elastic components are stretched
Term
Amortization phase:
Definition
Amount of time to move from eccentric to concentric motion
Quick as possible, Prevent loss of energy
Term
Concentric Phase of Plyo's:
Definition
“Outcome” phase
-Result of combined eccentric & amortization phases
-If done properly, results in increased force production with greater speed
-Training effect = better neuromuscular control
Term
Plyometric Prerequisites:
Definition

1.Biomechanical Examination
     a)Strength
     b)Function
2.Stability Testing
3.Dynamic Testing
4.Flexibility

Term
Plyometric Program Considerations:
Definition
Age, weight, level of activity, surface, footwear, technique, direction of movement, training demands.
Term
Plyometric precautions:
Definition
Post-exercise DOMs
Term
Plyometric Contraindications:
Definition
Acute inflammation
Post-operative conditions
Instability
Term
Classification of drills:
Definition
Jump, hop, bounds, box drills, depth jumps
Term
When to do plyometrics?
Definition
Between phases three and four of rehab when back to sport activity and maintence.
Term
How test strength for plyo?
Definition

-One rep max squat with two times body weigh

-60% of body weight, 5 squats, 5 seconds

Term
How test stability for plyo?
Definition

static: 30 sec one leg stance.

Dynamic: single leg quarter squats.

NO wabbling weakness, then pass.

Eccentric: jump tests. if long amortization phase, then insufficient.

Term
Eccentric Strength:
Definition
closed chain, weight bearing, uses functional movement patterns.
Term
Dynamic movement tests (up/lower/ab):
Definition

Lower- single leg jumping.

Upper- medicine ball is functional.

Seated chest pass-power.

Ab/lat power: Sit up and throw.

-weakness would be less than 15ft for women and 17ft for men.

Term
Benifits of plyometrics:
Definition
promotes neuromuscular efficiency. Better control of contracting muscle and its synergist yeilding a greater net force. Nervous system can be more autonomic. Also, minimum equipment needed.
Term
more time in amortization phase=
Definition
less force procuded
Term
Golgi Tendon:
Definition

tension limiting factor.

Desensitized durring plyometrics, raising inhibiton factor.

Leads to greater force production and load applied.

Term
Age consideration in plyo?
Definition
8-13= lower intensity
Term
Body weight considerations in plyo?
Definition
over 220, may need to modify
Term
level of activity in plyo?
Definition
Consider current level-- how active they are.
Term
Surface consideration in plyo?
Definition

Should be soft: grass, mats?

Nothing hard, it causes to much force on lower extremity.

Term
Foot wear consideration in plyo?
Definition

need good support, and cushion under balls of feet.

-no converse!

Term
Technique consideration for plyo?
Definition

-Landing on toes, and not heals.

Proper use of muscles

Term
direction consideration for plyo?
Definition
Train horizontal, but also a little vertical.
Term
training demand considerations in plyo?
Definition
maintenece vs conditioning
Term
recovery period times in plyo?
Definition

short (10-15) is more endurance

long (45-60) is more power.

Term
Frequency of plyometrics?
Definition
need at least 48hrs between each session
Term
Volume of plyometrics?
Definition
Intitial>low intensity> intermediate> advanced
Term
Duration in plyometrics?
Definition
fatigue comprimises technique. Need to consider. Want to give good work out, but not to fast. and when noticable, stop.
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