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ERIC Number: EJ829333
Record Type: Journal
Publication Date: 2006-Jun
Pages: 10
Abstractor: As Provided
Reference Count: 15
ISSN: ISSN-1091-367X
Heart Rate and VO[subscript 2] Responses to Cycle Ergometry in White and African American Men
Vehrs, Pat R.; Fellingham, Gilbert W.
Measurement in Physical Education and Exercise Science, v10 n2 p109-118 Jun 2006
The validity of estimates of peak oxygen consumption (VO[subscript 2]peak) using submaximal exercise tests may be compromised when the participants being tested are not similar to the participants used to develop the test. This study compared ethnic differences in the heart rate (HR) and oxygen consumption (VO[subscript 2]) responses to submaximal cycle ergometer exercise as well as measured and estimated VO[subscript 2]peak. Thirty-two men (White, n = 16; African American, n = 16) performed a graded maximal exercise test on a cycle ergometer. Submaximal HR and VO[subscript 2] at 4 workloads (50, 100, 150, and 200 watts), maximal HR, and measured peak VO[subscript 2] values were evaluated for ethnic differences. Submaximal VO[subscript 2] and HR values were used to estimate VO[subscript 2]peak based on the methods of the Astrand-Ryhming and Young Men's Christian Association (YMCA) submaximal exercise tests. White and African American men were matched for weight (87.6 plus or minus 8.7, 85.5 plus or minus 8.5 kg), body mass index (26.9 plus or minus 2.4, 27.4 plus or minus 2.5 kg/m[superscript 2]), VO[subscript 2]peak (3.56 plus or minus 0.38, 3.40 plus or minus 0.27 L/min), and maximal HR (185.8 plus or minus 4.9, 186.7 plus or minus 9.1), respectively. No ethnic differences were found in VO[subscript 2] responses across the 4 workloads (p = 0.31). Heart rate responses to the 4 workloads were significantly lower (p less than 0.0001) in the African American than in the White men. Estimated VO[subscript 2]peak values from the Astrand-Ryhming and YMCA protocols significantly (p less than 0.0001) overestimated measured VO[subscript 2]peak in the African American men but not for the White men. We conclude that White and African American men of similar cardiovascular fitness level differ in HR responses to submaximal exercise during cycle ergometry. Caution should be exercised when using prediction tests to estimate maximal performance for members of ethnic groups not represented among the participants used to develop the prediction tests. (Contains 1 figure and 2 tables.)
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Publication Type: Journal Articles; Reports - Research
Education Level: N/A
Audience: N/A
Language: English
Sponsor: N/A
Authoring Institution: N/A