PHED-3126EL Lecture Notes - Lecture 8: Energy Homeostasis, Sweat Gland, Thermogenesis
28 Dec 2019
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Chapter 8 energy expenditure during rest and physical activity. Body size plays an important contributing role in pa energy requirements: heavier people expend more energy to perform the same activity than people who weight less. Energy expenditure can be predicted during weight-bearing pa from body mass with almost as much accuracy as lab measured vo2. Two factors affect how researchers rate task difficulty: duration of effort. Pa ratio (par: ratio of energy required to resting energy requirement. Metabolic equivalent (met: 250 ml o2 min-1, 3. 5 ml o2 kg-1 min-1, 1. 0 kcal kg-1 h-1. Hr and vo2 relate linearly throughout broad range of aerobic pa intensities: hr during pa provides vo2 estimate and thus energy expenditure during diverse activities. Relationship between body mass and vo2 during submaximal treadmill walking. Efficiency and economy of movement: three factors determine success in aerobic performance, aerobic capacity (vo2max, sustained effort of large percentage of vo2max, efficiency of energy use (movement economy)
