Acute adaptations of strength exercises Flashcards
Difference warm up has been reported on explosive performance?
between 5 and 10%
Warm-ups the thermic effect?
An improvement of 1°c is equivalent to approximately 1%
improvement in performance
Why stretch before activity
Reduce injury
Post activation Potentiation (PAP)
Implementing a resistance exercise prior to an explosive movement has improved subsequent performance above the athletes perceived best
What is fatigue?
Depletion of fuel build up of metabolic by products Thermoregulation neural dampening reduction in muscle contractile elements
Mechanisms associated with PAP
Increased alpha motor neuron recruitment and a reduced reciprocal co-contraction
decreased angle of pennation
Neural recruitment and inhibition of
the co-contartcion Renshaw cell
First contraction – activates large motor units
Reduced inhibition by the Renshaw cell
Second contraction recruits more larger motor units – different muscle action
effects of Change in the concentric Force-Velocity
Relationship
identified a significant
positive shift in the velocity produced under the same relative load in thumb abduction
Methods of eliciting PAP
Vibration activation methods
Isometric activation methods
- Electrically induced
- voluntary induced
dynamic activation methods
- isoinertial strength exercises
- plyometric exercises#
What are the methodological factors that are important to PAP studies?
Participant characteristics
activation method volume
activation method intensity
recovery duration
study design
warm up
Application of PAP to dynamic performance
- Warm up
- Complex training
Strength and individual participant related factors
Back squat 1RM strength to weight ratios above 1.6 have been correlated to PAP
Elite athletes have produced PAP in comparison to recreationally strength
trained participants
Factors affecting muscle strength and power and their link to PAP
Fibre type
Joint position
Force-velocity
Architecture of muscle
