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Plyometrics - Explosive Power Training “The Link between Strength and Power”
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Plyometric zPleythyein (Ply- or Plio-) - to increase zMetric - to measure zMeasurable increase
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History zEastern block countries x 35 years zTraining regimen for track athletes zYuri Veroshanski (Soviet) - 1967
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Link between Strength and Power zStrength = Force zPower = F x D/T zPower = Strength/Time
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Link between Strength and Power Speed + Strength Power Speed-Strength = ability to exert maximal force during high-speed movements
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Definitions Exercises characterized by powerful muscular contractions in response to rapid, dynamic loading or stretching (Radcliffe and Farentinos, 1985)
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Definitions Any exercise that uses the natural elastic recoil elements of muscle and the stretch reflex to produce a stronger, faster muscle response (Chu, 1988)
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Physiology (Neurological) Myotatic/Stretch/Monosynaptic Reflex zMuscle Spindles - rate of stretch - length of stretch
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Physiology (Mechanical) Utilization of stored elastic (potential) energy zSEC zDependent on: - movement amplitude - transition (coupling) time
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Physiology SEC zStructures that transmit the active, muscle force production zEpimysium + Tendon zResist stretching but can be stretched zstiffness vs. compliance
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SEC Load Contractile Component (Active Tension) Series Elastic Component (External Tension)
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Components of Plyometrics Stretch-Shortening Cycle zEccentric Phase zAmortization Phase zConcentric Phase
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Plyometric Activities zBaseball Swing zGolf Swing zJumping zRunning zThrowing zChange of direction
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Lower Extremity Plyometric Activities Jumps-in-place zSquat jump zDouble-leg tuck jump (single) zDouble-leg vertical power jump (single) zBroad jump zPike jump
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Lower Extremity Plyometric Activities Jumps-in-place zSplit squat jump zCycle split squat jump zBroad/long jump zStanding triple jump
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Lower Extremity Plyometric Activities Hops zHops - double/single zigzag zDouble leg zSingle leg
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Lower Extremity Plyometric Activities Bounds zAlternate leg bounds zCombination leg bounds
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Lower Extremity Plyometric Activities Shock zIn-depth jumps zBox jumps - multiples
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Upper Extremity Plyometric Activities zPlyometric push-up zClap push-up zDrop-and-catch push-up zMedicine ball push-up zMedicine ball activities - catch and throws
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Trunk Plyometric Activities zMedicine ball sit-up zPlyometric leg raise
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Rehabilitation Applications zQuick stretch - PNF zStep downs zDynamic wall push-ups zPediatrics - obstacle courses, medicine ball zAngle boards
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Surfaces for Jumps zResilient zGrass zRubber/track
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Prescription Mode zlower vs. upper extremity zspecific types of exercise Intensity ztype of exercise (skips, hops, etc.) zheight of boxes (16 - 43”) = 30” zweight of balls
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Prescription Frequency zdays/week ( 1 - 3) Volume zrepetitions zground contacts (80 - 140)
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Prescription Volume guidelines zBeginner (80 - 100) zIntermediate (100 - 120) zAdvanced (120 - 140)
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Prescription Recovery z5 - 10 sec. between reps z2 - 3 min. between sets Program Length z4 - 10 weeks zOverload
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Prescription Progression zProgressive overload Warm-up
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Strength Base Lower Extremity zSquat: 1.5 - 2.5 x body weight ( = 1.5) Upper Extremity z five clap push-ups zBW > 250 lbs. BP BW zBW < 165 lbs. BP 1.5 x BW
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