PSY333H1 Lecture Notes - Lecture 3: Phosphocreatine, Creatine Kinase, Aerobic Exercise

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Any physical activity (even fidgeting) will use energy and burn calories. Exercise is a special class of physical activity. Four components of physical activity: type: identifies the physiological systems used in a particular activity. Flexibility: frequency: describes how much activity is performed over a period of time, duration: temporal length of physical activity. Many different types of exercise or physical activity, but physiologically there are 5 forms of exercise. Isometric exercise: contract muscle group against immovable object without movement in body (improves muscle strength) Isotonic response: place resistance on muscles by moving muscle groups; i. e. weight- lifting (improves strength and endurance) Isokinetic exercise: place resistance that overloads muscle groups through complete range of motion with variable resistance; need special equipment (best for strength and endurance) Other 2 forms: aerobic uses oxygen. Stimulates and strengthens heart and lungs improves body"s oxygen usage i. e. jogging, bicycling, swimming: anaerobic does not use oxygen. High-intensity, short-duration, low-endurance i. e. sprinting creates deficit in oxygen.

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