Metabolic Adaptations to Exercise7代谢适应性锻炼幻灯片PPT

Training
Aerobic interval training involves repeated bouts of high-intensity performance separated by brief rest periods.
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Training
This training, although traditionally considered only anaerobic, generates aerobic benefits because the rest period is so brief that full recovery can’t occur, thus the aerobic system is stressed.
There seems to be little benefit beyond this level in consideration of the added risk of injury.
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Training
Intensity is also a critical factor in improving performance.
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Response and Adaptation
These changes occurring in the muscles, combined with adaptations in the oxygen transport system, lead to enhanced functioning of the oxidative system and improved endurance.
Response and Adaptation
Endurance training increases both the number and the size of the mitochondria. Activities of many oxidative enzymes are increased with training.
Adaptations are specific to the speed and duration of training bouts, so those who perform at higher intensities must train at higher intensities.
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Response and Adaptation
Endurance training increases muscle myoglobin content by about 75% to 80% Myoglobin stores oxygen.
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Response and Adaptation
Peபைடு நூலகம்centages of ST and FT fibers do not appear to change Endurance training causes Ftb fibers to take on more Fta characteristics.
Response and Adaptation
Endurance training stresses ST muscle fibers more than FT fibers. Result - ST fibers enlarge with training. Hunters
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Type IIa – FTG – Pink – Anaerobic w/aerobic capability
Type IIb – FTO – White – Purely Anaerbobic - Multiple Fibers per Motor Unit – Power Fibers
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Metabolic Adaptations to Exercise7 代谢适应性锻炼幻灯片PPT
Illinois State University
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Finer Types
Type I – ST – Red – Aerobic – Fatigue Resistant – Few Fibers per Motor Unit
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Fuel Storage
Endurance-trained muscle stores considerably more glycogen than does untrained muscle.
Endurance-trained muscle also stores more fat (triglyceride) than does untrained muscle.
This leads to increased use of fat as an energy source, sparing glycogen.
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Training
The ideal training regimen should have a caloric expenditure of a minimum of 2,000 to a maximum of about 5,000 to 6,000 kcal per week.
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Fuel Storage
The activities of many enzymes involved in b oxidation of fat increase with training, thus free fatty acid levels increase.