Small Steps: The Impact of Physical Activity

Physical Activity and Cardiorespiratory Fitness The multistage fitness test is intended to measure a participant's maximum oxygen intake, or VO2 max. The test is similar to a shuttle run. The participant runs between two blocks that are 20 meters apart. They must complete each length before a prereDescribe how a multistage fitness test works and what it is intendcorded beep sounds. As the test continues, the beeps increase in ed to do. frequency. The test ends when the participant fails to complete a segment before the beep sounds or if they complete all the runs. Participants then compare their completed level to a chart to find their maximum oxygen intake. Aerobic exercise forces the body to provide extra oxygen to the muscles. True The three methods of measuring maximum oxygen intake are the multistage fitness test, the direct VO2 max measurement, and the estimated VO2 max. The multistage fitness test is useful because many people can do the test at once, and the results are What are the advantages and disadvantages of each of the meth- reasonably accurate, although it can be difficult to find the audio ods of calculating maximum oxygen intake? equipment to play the beeps. The direct VO2 max measurement is very accurate but requires special equipment, which is usually only available to medical professionals. The estimated VO2 max is simple to find and doesn't require activity, but it is the least accurate method of determining maximum oxygen intake. Cardiorespiratory fitness can only be measured through exercise. False The respiratory system should remove which of the following from your body? A. carbon monoxide B. carbon dioxide C. oxygen D. oxygen bioxide B. carbon dioxide Explain how the cardiovascular and respiratory systems work together to deliver oxygen to the body. The respiratory system inhales oxygen through the nose and mouth and collects it in the lungs. The oxygen is absorbed into the blood, which then travels throughout the body through arteries. The blood delivers oxygen to every part of the body. Once the oxygen has been delivered, that deoxygenated blood then travels back to the lungs through the veins. The deoxygenated blood drops off carbon dioxide in the lungs, which is then expelled through exhalation. Body composition has little to do with cardiorespiratory fitness. False Why do males tend to have better cardiorespiratory fitness than females? A. Males tend to have higher levels of hemoglobin in their blood. A. Males tend to have higher levels of hemoglobin in their blood. B. Females tend to have higher levels of hemoglobin in their blood. C. Males tend to have higher levels of body fat than females. D. Females tend to have more lean muscle mass than males. Doctors can directly measure a person's maximum oxygen intake by measuring their oxygen intake while they __________. A. do as many push-ups as possible B. run on a treadmill, which increases speed C. do jumping jacks until they are tired D. sit motionless with a resting heart rate B. run on a treadmill, which increases speed The factors that influence cardiorespiratory fitness are age, genDescribe the factors that influence the level of cardiorespiratory der, genetics, body composition, and a person's level of conditionfitness a person is able to achieve. ing. 1/1