PSY333H1 Lecture Notes - Lecture 4: Job Satisfaction, Social Class, Arcuate Nucleus
Document Summary
Health psychology: lecture 4 may 28 th , 2012. Exercise: physical activity: any skeletal muscle contraction that results in an increased energy expenditure. Any physical activity (even fidgeting) will use energy and burn calories: exercise: repetitive physical activity or movement aimed at improving or maintaining fitness or health. Four components of physical activity: type: identifies the physiological systems used in a particular activity (aerobic, strength, endurance, flexibility, frequency: describes how much activity is performed over a period of time. Intensity: describes load imposed on physiological systems. (physiological load: how much our systems have to do to control the load, climbing stair is more of a load than a flat surface: duration: temporal length of physical activity. Does type matter: many different types of exercise or physical activity but physiologically there are. Isometric exercise: contract muscle group against immovable object without movement in body (improves muscle strength) holding the subway rails, and plank position.
