Explain two ways that can be used to monitor level of physical exertion
• Perceived Exertion. A method used to determine if a vigorous level of exertion has been attained is the perception of an activity feeling "somewhat hard" to "hard" as indicated by breathlessness and/or a fatigue level. Generally a physical effort should allow conversation, not singing, but if one is out of breath quickly or the activity must be stopped to catch breath, then the exertion is too much.
• Heart Rate. Another common method used to determine level of exertion is to measure heart rate during or immediately after exercise and compare that rate to a target heart rate or a target zone. Your target heart rate is your recommended heart rate for exercising. Some authorities prefer to recommend a range of heart rates to aim for when exercising referred to as a target zone.
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Linoleic acid and alpha-linolenic acid are called essential fatty acids because
A. they have more than one double bond. B. they are not considered healthy. C. the body cannot make them. D. none of the above.
One of the following statements is NOT true. Critical periods refer to:
a. times when the embryo or fetus is susceptible to irreversible harm if the mother is malnourished or exposed to toxins. b. times when major organs and vital systems are forming and developing rapidly. c. periods of intense or accelerated embryonic or fetal development. d. times when nutritional deficiencies have little effect on the developing fetus.
At what age does peak bone mass usually occur?
A) teens B) 20s-30s C) 30s-40s D) 40s-50s
Subjects in a study who receive the treatment being tested are in the control group
a. True b. False Indicate whether the statement is true or false