Exercise Physiology: Theory and Application to Fitness and Performance
9th Edition
ISBN: 9780073523538
Author: Scott K Powers, Edward T Howley
Publisher: McGraw-Hill Education
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Chapter 1, Problem 7SQ
Summary Introduction
To calculate: The power output (kpm.min-1 and watts) during cycle ergometer exercise as per the given data.
Introduction: Work is defined as the supply of energy to an object, resulting in its movement. The SI unit of work is joule. Work is the product of force and distance. Newton (N) is the SI unit of force and meters (m) is the SI unit of distance. In exercise physiology, joule (product of newton and meters) is commonly used as the unit of work.
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Students have asked these similar questions
Dr. Cox (175 lbs) achieves 15 METS on a cycle ergometer VO2max test. If his exercise plan is to work at 70% of his max, at 75 rev/min, where should he set the resistance on his cycle ergometer?
Compute the oxygen cost of cycling (ml · kg-1 · min-1) at work rates of 50, 75, 100, 125 W for a 60-kg person.
These figures show that:
S
Vor (1-min¹)
30
A
2.5
20
1.5
1.0
0.5
(50)
10
Concentric
Eccentric
Exercise rate
(100)
20
(150)
Integrated EMG (counts min)
B
600
400
200
(50)
30
10
Mean torque on pedals (Nm)
(100)
Concentric
20
Exercise rate
(200)
(150)
Eccentric
30
O concentric contractions require more oxygen and more EMG than eccentric contractions
O concentric contractions are easier to perform than eccentric contractions
O eccentric contractions place a greater demand on the cardiovascular and nervous systems compared to
concentric contractions
O eccentric contractions use less oxygen but more EMG than concentric contractions
Chapter 1 Solutions
Exercise Physiology: Theory and Application to Fitness and Performance
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