Energy Transfer In Exercise. Immediate Energy ATP-PCr System 5-8 sec of max intensity exercise...
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Transcript of Energy Transfer In Exercise. Immediate Energy ATP-PCr System 5-8 sec of max intensity exercise...
Immediate Energy
• ATP-PCr System
• 5-8 sec of max intensity exercise
• Sprinting, football, weight lifting baseball, volleyball, etc.
Short-Term Energy
• Lactic Acid System (Anaerobic glycolysis)
• Maximal exercise between 60-180 seconds
• Increases blood lactate
• Lactate ranges from .5 – 20 mmole.L-1
• Half-life is ~ 15-30 min
• Removal is fasted during low-moderate aerobic exercise
Lactate Accumulation
• Onset of Blood Lactate Accumulation (OBLA)
• Blood Lactate Threshold
• Anaerobic Threshold
Trained vs Untrained
• Genetic endowment– Muscle fiber type– Blood flow characteristics
• Local training adaptations– Less lactate production– Greater lactate production– Greater lactate removal
Long-Term Energy
• Oxygen consumption , oxygen uptake
• VO2
• Resting values
• Submaximal values
• Maximal values
Reasonable VO2 Values
ml.kg-1.min-1 ml.min-1 METS
Rest 3.5 200-300 1
Maximal 40-55 2500-4000 11.4-15.7
Elite 75-85 5000-60000 21.4-24.3