VO2 max can be estimated by drawing a line through the heart rate values measured during a submaximal graded exercise test and extrapolating to the age-adjusted maximal heart rate. Which of the following factors could contribute to an underestimation of VO2 max using this type of submaximal test?
A. the subject held onto the treadmill railing during the test
B. a cool testing environment
C. a hot and humid testing environment
D. All of these answers are correct
Answer: C
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What will be an ideal response?