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Module 3 Quiz
metabolic equations
| Question | Answer |
|---|---|
| Work is defined as: | force times distance |
| The SI unit for work is the | joule (J) |
| Calculate the power if 600 joules of work are completed in 60 seconds: | 10 watts |
| Calculating the work performed on a cycle ergometer requires that you know all of the following except - subject's body weight - resistance against flywheel - pedaling speed - exercise time | ?? |
| DIRECT calorimetry is a method of determining energy expenditure and involves the measurement of: | heat production |
| The most common technique used to measure oxygen consumption in exercise physiology laboratories is: | open-circuit spirometry |
| A MET is defined as a metabolic equivalent and is equal to: | resting VO2 |
| Net efficiency is defined as: | work performed/energy expended above rest times 100 |
| Exercise efficiency is greater in subjects who: | have a higher percentage of slow muscle fibers |
| A subject performing a 10-MET activity would have an oxygen consumption of approximately: | 35 mL/kg/min |
| The SI units used to describe power are: | watts |
| Net efficiency ____ as work rate increases | decreases |
| T/F: Work equals power divided by time. | false |
| T/F: The SI unit used for both work and energy is the joule. | true |
| A runner who exhibits poor running economy would require: | a higher VO2 at any given running speed compared to an economical runner |
| Using the percentage of heart rate reserve method to prescribe exercise intensity, which of the following is the correct answer given the available test data below? HRrest: 70 bpm HRmax: 180 bpm Desired exercise intensity: 50% | 125 bpm |
| One MET is equivalent to: | 3.5 mL/kg/min |
| Two individuals, one weighing 110 lb (50 kg) and the other weighing 176 lb (80 kg), have maximal oxygen consumptions of 52 mL/kg/min. they both exercise at 2.5 mph (67 m/min) and 12% grade on the treadmill. Which of the following variables will be approxi | METs |
| The health-related gains that occur with physical activity are realized when the volume of physical activity is between ____ and ____ MET-min/wk. | 500; 1000 |
| T/F: An unfit individual and a fit individual who both exercise at a level of 5.0 METs will most likely be working at equal intensities relative to their maximal MET capacity. | true |
| A 50-yr-old man who weights 193 lb (87.5 kg) and has a resting heart rate (HR) of 70 bpm wants you to help him calculate his target heart rate (THR) zone for 60% to 80% VO2reserve. Use the Karvonen (HRR) method to do so. | 130 to 150 bpm |
| A 30-yr-old woman with a maximal HR of 180 bpm and a resting HR of 60 bpm needs help calculating a THR range using the %HRmax method. What is her THR zone at 55% to 75% of her HRmax? | 125 to 163 bpm |
| You are calculating an exercise intensity for a client with a VO2max of 53.5 mL/kg/min. If he wanted to work at 65% of his VO2max, what level of intensity, in mL/kg/min, would you suggest for him? | 35 |
| A 55 kg woman walks at 80 m/min on a 7.5% grade. What is the energy requirement in mL/kg/min? | 22.3 |
| A 65 kg woman runs at 130 m/min on a 2% grade. What is the approximate energy requirement in mL/kg/min? | 36 |
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