Aerobic Capacity
- Created by: E-Heuschneider
- Created on: 25-05-19 11:39
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- Aerobic Capacity
- Definition
- The ability of the body to inspire, transport and utilise oxygen to perform sustained periods of aerobic activity
- It's dependent on efficiency of respiratory, cardiovascular and muscular systems, it underpins all endurance based work, e.g. long-distance running/swimming/cycling.
- The ability of the body to inspire, transport and utilise oxygen to perform sustained periods of aerobic activity
- VO?max.
- Max. volume of oxygen inspired, transported and utilised per minute during exhaustive exercise.
- Measured in ml/kg/min, the higher the % attained before fatigue sets in, the higher the aerobic capacity.
- Max. volume of oxygen inspired, transported and utilised per minute during exhaustive exercise.
- Affecting factors
- Physiological make-up
- The greater the efficiency of the respiratory and cardiovascular system and muscle cells to inspire, transport and utilise oxygen, the higher the VO?max.
- Strong respiratory muscles and large lung capacities can inspire more air, a large & strong left ventricle will increase SV & CO, raising blood flow.
- Increased haemoglobin content in blood will transport more oxygen for aerobic energy production.
- Capillarisation will increase SA for gas exchange. A high % of SO fibres rich in myoglobin and mitochondria produce more energy aerobically.
- The greater the efficiency of the respiratory and cardiovascular system and muscle cells to inspire, transport and utilise oxygen, the higher the VO?max.
- Age
- Early 20s- VO?max. drops approx. 1% per year.
- Lost elasticity in tissue walls with age reduces efficiency to inspire and transport oxygen.
- Early 20s- VO?max. drops approx. 1% per year.
- Gender
- Females tend to have a 15-30% lower VO?max. than males.
- Females have a higher % of body fat, smaller lung volumes, SV and CO at maximal work and lower haemoglobin levels, reducing efficiency to inspire and transport oxygen for aerobic energy production.
- Females tend to have a 15-30% lower VO?max. than males.
- Training
- Aerobic training will increase VO?max. by 10-20%.
- Causes increased strength of respiratory muscles, levels of haemoglobin, myoglobin and mitochondria, which increases efficiency to inspire, transport and utilise oxygen.
- Aerobic training will increase VO?max. by 10-20%.
- Physiological make-up
- Definition
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