Metabolic and Perceptual Responses to Constant Heart Rate Exercise at Vigorous Intensities in Women

Djadmann Gustave; Clara J. Mitchinson; Pasquale J. Succi; Brian Benitez; Minyoung Kwak; Kathryn R. Lanphere; Jody L. Clasey; Haley C. Bergstrom

doi:10.1249/MSS.0000000000003381

Metabolic and Perceptual Responses to Constant Heart Rate Exercise at Vigorous Intensities in Women

Djadmann Gustave, Clara J. Mitchinson, Pasquale J. Succi, Brian Benitez, Minyoung Kwak, Kathryn R. Lanphere, Jody L. Clasey, Haley C. Bergstrom

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1 Scopus citations

Abstract

Purpose This study quantified the metabolic demands (oxygen uptake (VO2)), power output adjustments, changes in the VO₂/power output ratio, and perceptual responses (rating of perceived exertion (RPE)) during constant heart rate (HR) exercise performed within the vigorous intensity range (77%-95% HR_peak). Methods Twelve women (mean ± SD age, 22 ± 4 yr) performed a graded exercise test to exhaustion to determine peak parameters, and three randomly ordered, constant HR trials to exhaustion or for 60 min at the lower (HR_L = 77% HR_peak), middle (HR_M = 86% HR_peak), and higher (HR_H = 95% HR_peak) end of the vigorous intensity range. Time course of changes and patterns of responses were examined for VO₂, power output, VO₂/power output, and RPE for the composite and for each subject. Results Across the HR_L (time to exhaustion (T_lim) = 56.3 ± 9.9 min), HR_M (51.8 ± 13.5 min), and HR_H (27.2 ± 17.7 min) trials, VO₂ and power output decreased quadratically (P < 0.05) relative to the initial value from 10% to 100% of T_lim, whereas the VO₂/power output increased quadratically from 20% to 100% T_lim, and RPE increased linearly from 50% to 100% T_lim. The VO₂ and RPE, collapsed across time, for HR_L (54.3% ± 3.3% VO_2peak, 11 ± 1.5 RPE) were lower than HR_M (64.9% ± 4.5% VO_2peak, 14 ± 1.7 RPE), and both were lower than HR_H (80.1% ± 4.1% VO_2peak, 17 ± 1.4 RPE). None of the 12 subjects at HR_L, 6 at HR_M, and 7 at HR_H were within the vigorous VO₂ range. Conclusions The HR_L was not sufficient to meet the desired metabolic intensity for vigorous exercise, whereas the middle to higher end of the range elicited a VO₂ within the prescribed range of only ∼50%-60% of the subjects. This study indicated that exercise held constant at a percentage of HR_peak cannot consistently be used to prescribe a desired metabolic stimulus.

Original language	English
Pages (from-to)	917-926
Number of pages	10
Journal	Medicine and Science in Sports and Exercise
Volume	56
Issue number	5
DOIs	https://doi.org/10.1249/MSS.0000000000003381
State	Published - May 1 2024

Bibliographical note

Publisher Copyright:
© 2024 Lippincott Williams & Wilkins.

Funding

This study was supported by the University Kinesiology and Health Promotion Spring Research award. The results of the study are presented clearly, honestly, and without fabrication, falsification, or inappropriate data manipulation. The results of the present study do not constitute endorsement by the American College of Sports Medicine.

Funders	Funder number
University Kinesiology and Health Promotion Spring Research

Keywords

CARDIORESPIRATORY FITNESS
CYCLING
ENDURANCE TRAINING
METABOLIC INTENSITY
PERCEPTION OF EFFORT

ASJC Scopus subject areas

Orthopedics and Sports Medicine
Physical Therapy, Sports Therapy and Rehabilitation

Access to Document

10.1249/MSS.0000000000003381

Cite this

@article{05db13e7c5904c218980b86d7d2e8e3e,

title = "Metabolic and Perceptual Responses to Constant Heart Rate Exercise at Vigorous Intensities in Women",

abstract = "Purpose This study quantified the metabolic demands (oxygen uptake (VO2)), power output adjustments, changes in the VO2/power output ratio, and perceptual responses (rating of perceived exertion (RPE)) during constant heart rate (HR) exercise performed within the vigorous intensity range (77\%-95\% HRpeak). Methods Twelve women (mean ± SD age, 22 ± 4 yr) performed a graded exercise test to exhaustion to determine peak parameters, and three randomly ordered, constant HR trials to exhaustion or for 60 min at the lower (HRL = 77\% HRpeak), middle (HRM = 86\% HRpeak), and higher (HRH = 95\% HRpeak) end of the vigorous intensity range. Time course of changes and patterns of responses were examined for VO2, power output, VO2/power output, and RPE for the composite and for each subject. Results Across the HRL (time to exhaustion (Tlim) = 56.3 ± 9.9 min), HRM (51.8 ± 13.5 min), and HRH (27.2 ± 17.7 min) trials, VO2 and power output decreased quadratically (P < 0.05) relative to the initial value from 10\% to 100\% of Tlim, whereas the VO2/power output increased quadratically from 20\% to 100\% Tlim, and RPE increased linearly from 50\% to 100\% Tlim. The VO2 and RPE, collapsed across time, for HRL (54.3\% ± 3.3\% VO2peak, 11 ± 1.5 RPE) were lower than HRM (64.9\% ± 4.5\% VO2peak, 14 ± 1.7 RPE), and both were lower than HRH (80.1\% ± 4.1\% VO2peak, 17 ± 1.4 RPE). None of the 12 subjects at HRL, 6 at HRM, and 7 at HRH were within the vigorous VO2 range. Conclusions The HRL was not sufficient to meet the desired metabolic intensity for vigorous exercise, whereas the middle to higher end of the range elicited a VO2 within the prescribed range of only ∼50\%-60\% of the subjects. This study indicated that exercise held constant at a percentage of HRpeak cannot consistently be used to prescribe a desired metabolic stimulus.",

keywords = "CARDIORESPIRATORY FITNESS, CYCLING, ENDURANCE TRAINING, METABOLIC INTENSITY, PERCEPTION OF EFFORT",

author = "Djadmann Gustave and Mitchinson, \{Clara J.\} and Succi, \{Pasquale J.\} and Brian Benitez and Minyoung Kwak and Lanphere, \{Kathryn R.\} and Clasey, \{Jody L.\} and Bergstrom, \{Haley C.\}",

note = "Publisher Copyright: {\textcopyright} 2024 Lippincott Williams \& Wilkins.",

year = "2024",

month = may,

day = "1",

doi = "10.1249/MSS.0000000000003381",

language = "English",

volume = "56",

pages = "917--926",

number = "5",

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T1 - Metabolic and Perceptual Responses to Constant Heart Rate Exercise at Vigorous Intensities in Women

AU - Gustave, Djadmann

AU - Mitchinson, Clara J.

AU - Succi, Pasquale J.

AU - Benitez, Brian

AU - Kwak, Minyoung

AU - Lanphere, Kathryn R.

AU - Clasey, Jody L.

AU - Bergstrom, Haley C.

PY - 2024/5/1

Y1 - 2024/5/1

N2 - Purpose This study quantified the metabolic demands (oxygen uptake (VO2)), power output adjustments, changes in the VO2/power output ratio, and perceptual responses (rating of perceived exertion (RPE)) during constant heart rate (HR) exercise performed within the vigorous intensity range (77%-95% HRpeak). Methods Twelve women (mean ± SD age, 22 ± 4 yr) performed a graded exercise test to exhaustion to determine peak parameters, and three randomly ordered, constant HR trials to exhaustion or for 60 min at the lower (HRL = 77% HRpeak), middle (HRM = 86% HRpeak), and higher (HRH = 95% HRpeak) end of the vigorous intensity range. Time course of changes and patterns of responses were examined for VO2, power output, VO2/power output, and RPE for the composite and for each subject. Results Across the HRL (time to exhaustion (Tlim) = 56.3 ± 9.9 min), HRM (51.8 ± 13.5 min), and HRH (27.2 ± 17.7 min) trials, VO2 and power output decreased quadratically (P < 0.05) relative to the initial value from 10% to 100% of Tlim, whereas the VO2/power output increased quadratically from 20% to 100% Tlim, and RPE increased linearly from 50% to 100% Tlim. The VO2 and RPE, collapsed across time, for HRL (54.3% ± 3.3% VO2peak, 11 ± 1.5 RPE) were lower than HRM (64.9% ± 4.5% VO2peak, 14 ± 1.7 RPE), and both were lower than HRH (80.1% ± 4.1% VO2peak, 17 ± 1.4 RPE). None of the 12 subjects at HRL, 6 at HRM, and 7 at HRH were within the vigorous VO2 range. Conclusions The HRL was not sufficient to meet the desired metabolic intensity for vigorous exercise, whereas the middle to higher end of the range elicited a VO2 within the prescribed range of only ∼50%-60% of the subjects. This study indicated that exercise held constant at a percentage of HRpeak cannot consistently be used to prescribe a desired metabolic stimulus.

AB - Purpose This study quantified the metabolic demands (oxygen uptake (VO2)), power output adjustments, changes in the VO2/power output ratio, and perceptual responses (rating of perceived exertion (RPE)) during constant heart rate (HR) exercise performed within the vigorous intensity range (77%-95% HRpeak). Methods Twelve women (mean ± SD age, 22 ± 4 yr) performed a graded exercise test to exhaustion to determine peak parameters, and three randomly ordered, constant HR trials to exhaustion or for 60 min at the lower (HRL = 77% HRpeak), middle (HRM = 86% HRpeak), and higher (HRH = 95% HRpeak) end of the vigorous intensity range. Time course of changes and patterns of responses were examined for VO2, power output, VO2/power output, and RPE for the composite and for each subject. Results Across the HRL (time to exhaustion (Tlim) = 56.3 ± 9.9 min), HRM (51.8 ± 13.5 min), and HRH (27.2 ± 17.7 min) trials, VO2 and power output decreased quadratically (P < 0.05) relative to the initial value from 10% to 100% of Tlim, whereas the VO2/power output increased quadratically from 20% to 100% Tlim, and RPE increased linearly from 50% to 100% Tlim. The VO2 and RPE, collapsed across time, for HRL (54.3% ± 3.3% VO2peak, 11 ± 1.5 RPE) were lower than HRM (64.9% ± 4.5% VO2peak, 14 ± 1.7 RPE), and both were lower than HRH (80.1% ± 4.1% VO2peak, 17 ± 1.4 RPE). None of the 12 subjects at HRL, 6 at HRM, and 7 at HRH were within the vigorous VO2 range. Conclusions The HRL was not sufficient to meet the desired metabolic intensity for vigorous exercise, whereas the middle to higher end of the range elicited a VO2 within the prescribed range of only ∼50%-60% of the subjects. This study indicated that exercise held constant at a percentage of HRpeak cannot consistently be used to prescribe a desired metabolic stimulus.

KW - CARDIORESPIRATORY FITNESS

KW - CYCLING

KW - ENDURANCE TRAINING

KW - METABOLIC INTENSITY

KW - PERCEPTION OF EFFORT

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Metabolic and Perceptual Responses to Constant Heart Rate Exercise at Vigorous Intensities in Women

Abstract

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Keywords

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