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21 Cards in this Set
- Front
- Back
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What are the factors that affect performance?
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Energy production, Environment, Strength/Skill, Diet, and CNS Function
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What are the 2 classifications of fatigue?
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Central fatigue and Peripheral fatigue
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Central fatigue would be implicated in fatigue if there was:
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a reduction in the # of functioning motor units used to perform a task
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Peripheral fatigue includes:
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Neural factors, mechanical factors, and energetics of contraction
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What are the physiological factors affecting fatigue?
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VO2 max, Lactate threshold, Movement economy, and Anaerobic capacity
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What limits the VO2max?
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Respiration, Central Circulation, Peripheral circulation, and muscle metabolism
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What is the VO2max range for normal young adults?
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Men: 35-55
Women: 30-50 |
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Stroke Volume
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volume of blood ejected from the ventricles per beat.
SV=EDV - ESV |
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What are 3 factors that cause increase in SV during endurance training?
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Increased EDV
Increased contractility Decreased TPR |
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Frank-Starling Mechanism
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more you fill heart, more it stretches, more it pumps
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What 3 reasons explain the increase in EDV (preload)?
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Increased venticular volume
Increased filling time and venous return Increased plasma volume |
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Possible causes of LT?
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Increased production
decreased removal |
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What could cause increased production of lactate?
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muscle hypoxia, stimulation of glycogenolysis by epinephrine, recruitment of FT muscle fibers
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What cause cause decreased removal of lactate?
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decreased uptake of lactate by liver/kidney and other tissues due to shunting of blood away from inactive muscles during exercise
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Increased levels of mitochondria mean:
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better fat utilization, use less carbs @ given intensity, decreased lactate production
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Internal segmentation
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coordination of all body parts and how you use them
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movement economy
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the energy expended to perform an activity in relation to the external work done (ratio between the two)
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efficiency vs. economy
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% of E expended that was converted to external work
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equipment can improve economy by:
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reducing external resistance forces and improving force production
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5 Basic principles of training
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specificity
progressive overload periodization individualization reversibility |
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reversibility
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"use it or lose it"
loss of aerobic adaptations occurs more quickly than anaerobic adaptations |
