PHYS ED 32 Lecture 2: Lecture 2 (PE 32).docx
23 Oct 2013
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Defined as the ability of the body to perform prolonged, large muscle, dynamic exercise at moderate to high levels of intensity: take in (lungs, deliver (heart, use (muscle cells) The body converts chemical energy from food into substances the cells can use as fuel. Atp (adenosine triphosphate) basic form of energy used by cells: converts food substances that cells use as fuel. Body stores of glycogen, glucose, fat and protein. 1500m run, 30 min walk, standing in line for a long time. Fuel utilization based on intensity and duration of exercise. The harder you work, higher use of carbs and less use of fat. * max heart rate: 220-age +/- 15 beats/min. [heart rate * stroke volume] * a-vo2 diff = vo2 max. Improved extraction of oxygen from blood to muscles. Increased size and number of mitochondria in muscle cells: spare carbs increase use of fat and lactate as fuels.
