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The relationship between %HRpeak and %JOURNAL/mespex/04.02/00005768-200005000-00023/ENTITY_OV0312/v/2017-07-20T222734Z/r/image-pngO2peak in patients with chronic obstructive pulmonary disease

SIMMONS, DAVID N.; BERRY, MICHAEL J.; HAYES, SUSAN I.; WALSCHLAGER, SCOTT A.

Medicine & Science in Sports & Exercise: May 2000 - Volume 32 - Issue 5 - p 881-886
Clinical Sciences: Clinical Investigations

SIMMONS, D. N., M. J. BERRY, S. I. HAYES, and S. A. WALSCHLAGER. The relationship between %HRpeak and %O2peak in patients with chronic obstructive pulmonary disease. Med. Sci. Sports Exerc., Vol. 32, No. 5, pp. 881–886, 2000.

Purpose The relationship between the percent peak oxygen consumption (%O2peak) and percent peak heart rate (%HRpeak) has been suggested as a method for exercise prescription. According to the American College of Sports Medicine (ACSM), 50, 60, 80, and 85% of O2peak represent 62, 70, 85, and 90% of HRpeak, respectively. Recent research with young healthy adults has shown that this relationship is not as ACSM suggests. Furthermore, it has been suggested that this relationship be examined in populations with low functional capacity.

Methods The present study evaluated the relationship between %HRpeak and %O2peak in 125 patients with chronic obstructive pulmonary disease before and then after 3 months of exercise intervention.

Results The mean percentages of HRpeak for the COPD patients at baseline were 70, 76, 87, and 90% at 50, 60, 80, and 85% of O2peak. Percentages of HRpeak at 50, 60, and 80% of O2peak were significantly different from those suggested by ACSM. The mean percentages of HRpeak after the 3-month exercise intervention were 71, 77, 87, and 90% at 50, 60, 80, and 85% of O2peak. Percentages of HRpeak at 50, 60, and 80% of O2peak were significantly different from those suggested by ACSM. There were no significant differences between the slopes and the intercepts of the two equations used to describe the relationship between %HRpeak and %O2peak. Therefore, we pooled the data from the pre- and post-intervention tests to form the following equation to describe the relationship between %HRpeak and %O2peak for COPD patients: %HRpeak = 0.55 ( ± 0.01)%O2 peak + 43.2 (±1.4).

Conclusion In conclusion, the relationship between %HRpeak and %O2peak described by ACSM is not applicable to patients with COPD. Furthermore, this relationship does not change with exercise training and can be described by a single equation.

Department of Health and Exercise Science, Wake Forest University, Winston-Salem, NC

Submitted for publication September 1998.

Accepted for publication September 1999.

Address for correspondence: Michael J. Berry, Ph.D., Department of Health and Exercise Science, P.O. Box 7868, Wake Forest University, Winston-Salem, NC 27109; E-mail: berry@wfu.edu.

© 2000 Lippincott Williams & Wilkins, Inc.