EHS 385 Lecture Notes - Lecture 2: Metabolic Equivalent, Spirometer, Resting Metabolic Rate
9 Dec 2017
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Chapter 1 lecture 2 oc measurements in exercise physiology. Metric system: standard measurement for scientists used to express mass, length, and volume. System international (si) units: for standardizing units of measurement. In si units: work (j) = force (n) x distance (m) In si units: power (w) = work (j) / time (s) Ergometer: device used to measure work: bench step ergometer, cycle, arm, treadmill. Methods of measuring body"s heat production (energy expenditure) Direct calorimetry: measures body"s heat production to calculate energy expenditure. Indirect calorimetry: calculates energy expenditure from the respiratory exchange ratio (rer) of vco2 and vo2. Measurement of heat production as indication of metabolic rate. Foodstuffs + o2 atp [cell work heat] + heat. Commonly measurement in calories: 1 kilocalorie (kcal) = 1,000 calories, 1 kcal = 4186 j or 4. 186 kj. Measurement of o2 consumption as estimate of metabolic rate. Food stuffs + o2 heat + co2 + h2o.
