Factors underlying the perception of effort during constant heart rate running above and below the critical heart rate

Haley C Bergstrom; Terry J Housh; Kristen C Cochrane; Nathaniel D M Jenkins; Jorge M Zuniga; Samuel L Buckner; Jacob A Goldsmith; Richard J Schmidt; Glen O Johnson; Joel T Cramer

doi:10.1007/s00421-015-3204-y

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Factors underlying the perception of effort during constant heart rate running above and below the critical heart rate

Journal article

Peer reviewed

Factors underlying the perception of effort during constant heart rate running above and below the critical heart rate

Haley C Bergstrom, Terry J Housh, Kristen C Cochrane, Nathaniel D M Jenkins, Jorge M Zuniga, Samuel L Buckner, Jacob A Goldsmith, Richard J Schmidt, Glen O Johnson and Joel T Cramer

European journal of applied physiology, Vol.115(10), pp.2231-2241

10/2015

DOI: 10.1007/s00421-015-3204-y

PMID: 26108674

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Abstract

This study examined: (1) the sustainability of the critical heart rate (CHR) minus 5 b min(-1) (CHR - 5) and CHR plus 5 b min(-1) (CHR + 5); (2) the ratings of perceived exertion (RPE), velocity, [Formula: see text], minute ventilation ([Formula: see text]), breathing frequency (f b ), and electromyographic amplitude (EMG AMP) and EMG mean power frequency (MPF) responses during treadmill running at CHR - 5 and CHR + 5 to determine what factors underlie the perception of effort when heart rate (HR) is held constant; and (3) the relationships among RPE, [Formula: see text], and HR, to determine which variable(s) reflect exhaustion during exercise performed at a constant HR. The CHR was determined in eight runners (mean ± SD; age = 24 ± 3 years) from a series of four exhaustive, constant velocity runs. The RPE, velocity, [Formula: see text], [Formula: see text], f b , EMG AMP, and EMG MPF responses were recorded during runs at the CHR - 5 and CHR + 5. At CHR - 5, RPE, f b, and EMG MPF increased, while velocity, [Formula: see text], [Formula: see text], and EMG AMP decreased. At CHR + 5, RPE and f b increased, velocity, [Formula: see text], [Formula: see text], and EMG AMP decreased, and EMG MPF remained constant. The close association between f b and RPE throughout the run at CHR - 5 and during the last 50 % of the run at CHR + 5 indicated that muscle afferents may have provided feedback from metabolic and mechanical stimuli that contributed to the perceptual responses. In addition, only RPE consistently indicated exhaustion and the current findings supported its use to monitor exercise performed at a constant HR.

Adolescent

Adult

Blood Pressure

Heart Rate

Humans

Male

Physical Exertion

Running - physiology

Details

Title: Subtitle: Factors underlying the perception of effort during constant heart rate running above and below the critical heart rate
Creators: Haley C Bergstrom - University of Kentucky
Terry J Housh - University of Nebraska–Lincoln
Kristen C Cochrane - University of Nebraska–Lincoln
Nathaniel D M Jenkins - University of Nebraska–Lincoln
Jorge M Zuniga - Creighton University
Samuel L Buckner - University of Mississippi
Jacob A Goldsmith - Florida Atlantic University
Richard J Schmidt - University of Nebraska–Lincoln
Glen O Johnson - University of Nebraska–Lincoln
Joel T Cramer - University of Nebraska–Lincoln
Resource Type: Journal article
Publication Details: European journal of applied physiology, Vol.115(10), pp.2231-2241
DOI: 10.1007/s00421-015-3204-y
PMID: 26108674
NLM abbreviation: Eur J Appl Physiol
ISSN: 1439-6319
eISSN: 1439-6327
Language: English
Date published: 10/2015
Academic Unit: Center for Social Science Innovation; Injury Prevention Research Center; Health, Sport, and Human Physiology
Record Identifier: 9984259652902771

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