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13 Cards in this Set
- Front
- Back
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Maximal aerobic power |
- highest mitochondrial transformation of chemical energy per minute - measured as VO2 max |
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Aerobic capacity |
- total chemical energy available to perform aerobic work - no single index used consistently - endurance performance, time of exhaustion, biochemical indicators |
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3 energy systems |
1) ATP-CP system 2) Glycogen to lactate system 3) O2 system |
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Aerobic Metabolism |
- estimation of pure aerobic metabolism is impossible to perform because of the influence of anaerobic metabolism - moderate exercise intensity 8 to 10 min |
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Measurement of Maximal Aerobic Power |
- maximal effort a requirement - > 8 minutes - increasing workload
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Testing Children |
- Cycle Modifications: seat closer to pedals, visual cadence (metronome) - Treadmill vs Cycle: max VO2 cycle |
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How to calculate VO2 max |
- calculate mechanical power (watts) at maximal effort
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Maximal VO2 test Criteria |
- max heart rate= 220-age - VO2 plateau despite increased workload - 40-50% of children reach plateau |
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Growth related adaptations in aerobic performance |
- cardiovascular - ventilatory - economy of movement |
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Cardiovascular adaptations |
- Fick equation - at a young age VO2 increases with exercise |
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Ventilatory Adaptations |
- exercise=increased O2 demand=increase supply - in children: at a similar VO2, ventilation is higher - ventilatory equivalent decreases with age |
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Movement Economy |
- compared to adults, young children have a high cost of locomotion - at same treadmill speed: 5 year old cost is 37% greater than 17 year old - no gender difference - children have lower metabolic reserve |
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Metabolic Reserve |
- VO2 max minus VO2 during submaximal exercise - shorter legs=more strides= increase cost per speed |
