Validity of the relative percent concept for equating training intensity

Victor Katch, Arthur Weltman, Stanley Sady, Patty Freedson

Research output: Contribution to journalArticle

137 Citations (Scopus)

Abstract

The validity of the relative percent concept for equating training intensity was investigated using the point of metabolic acidosis (anaerobic threshold) as the criterion variable. Percent oxygen uptake, heart rate and metabolic acidosis were determined at 60, 70, and 80% of max heart rate on a bicycle ergometer test (N=31). At 60 and 70% of max heart rate only one individual was definitely in metabolic acidosis. At 80% max heart rate 17 subjects were working at a level above the point of metabolic acidosis while 14 were working at or below this point. Thus, it was suggested that even if subjects are exercising at the same relative percent maximum HR, the metabolic stress using metabolic acidosis as the criterion is not constant across subjects. It was further shown that the regression of percent {Mathematical expression}O2 max on percent max HR was a spurious one resulting in poor prediction of individual {Mathematical expression}O2 values. The data presented suggest that the relative percent concept for equating exercise or subsequent training intensity needs careful re-evaluation.

Original languageEnglish (US)
Pages (from-to)219-227
Number of pages9
JournalEuropean Journal of Applied Physiology and Occupational Physiology
Volume39
Issue number4
DOIs
StatePublished - Dec 1978
Externally publishedYes

Fingerprint

Acidosis
Heart Rate
Anaerobic Threshold
Physiological Stress
Oxygen

Keywords

  • Anaerobic threshold
  • Exercise
  • Intensity
  • Metabolic acidosis
  • Training
  • {Mathematical expression}O max

ASJC Scopus subject areas

  • Public Health, Environmental and Occupational Health
  • Physiology

Cite this

Validity of the relative percent concept for equating training intensity. / Katch, Victor; Weltman, Arthur; Sady, Stanley; Freedson, Patty.

In: European Journal of Applied Physiology and Occupational Physiology, Vol. 39, No. 4, 12.1978, p. 219-227.

Research output: Contribution to journalArticle

Katch, Victor ; Weltman, Arthur ; Sady, Stanley ; Freedson, Patty. / Validity of the relative percent concept for equating training intensity. In: European Journal of Applied Physiology and Occupational Physiology. 1978 ; Vol. 39, No. 4. pp. 219-227.
@article{2537a71786524150982960c78ce60d7c,
title = "Validity of the relative percent concept for equating training intensity",
abstract = "The validity of the relative percent concept for equating training intensity was investigated using the point of metabolic acidosis (anaerobic threshold) as the criterion variable. Percent oxygen uptake, heart rate and metabolic acidosis were determined at 60, 70, and 80{\%} of max heart rate on a bicycle ergometer test (N=31). At 60 and 70{\%} of max heart rate only one individual was definitely in metabolic acidosis. At 80{\%} max heart rate 17 subjects were working at a level above the point of metabolic acidosis while 14 were working at or below this point. Thus, it was suggested that even if subjects are exercising at the same relative percent maximum HR, the metabolic stress using metabolic acidosis as the criterion is not constant across subjects. It was further shown that the regression of percent {Mathematical expression}O2 max on percent max HR was a spurious one resulting in poor prediction of individual {Mathematical expression}O2 values. The data presented suggest that the relative percent concept for equating exercise or subsequent training intensity needs careful re-evaluation.",
keywords = "Anaerobic threshold, Exercise, Intensity, Metabolic acidosis, Training, {Mathematical expression}O max",
author = "Victor Katch and Arthur Weltman and Stanley Sady and Patty Freedson",
year = "1978",
month = "12",
doi = "10.1007/BF00421445",
language = "English (US)",
volume = "39",
pages = "219--227",
journal = "European Journal of Applied Physiology",
issn = "1439-6319",
publisher = "Springer Verlag",
number = "4",

}

TY - JOUR

T1 - Validity of the relative percent concept for equating training intensity

AU - Katch, Victor

AU - Weltman, Arthur

AU - Sady, Stanley

AU - Freedson, Patty

PY - 1978/12

Y1 - 1978/12

N2 - The validity of the relative percent concept for equating training intensity was investigated using the point of metabolic acidosis (anaerobic threshold) as the criterion variable. Percent oxygen uptake, heart rate and metabolic acidosis were determined at 60, 70, and 80% of max heart rate on a bicycle ergometer test (N=31). At 60 and 70% of max heart rate only one individual was definitely in metabolic acidosis. At 80% max heart rate 17 subjects were working at a level above the point of metabolic acidosis while 14 were working at or below this point. Thus, it was suggested that even if subjects are exercising at the same relative percent maximum HR, the metabolic stress using metabolic acidosis as the criterion is not constant across subjects. It was further shown that the regression of percent {Mathematical expression}O2 max on percent max HR was a spurious one resulting in poor prediction of individual {Mathematical expression}O2 values. The data presented suggest that the relative percent concept for equating exercise or subsequent training intensity needs careful re-evaluation.

AB - The validity of the relative percent concept for equating training intensity was investigated using the point of metabolic acidosis (anaerobic threshold) as the criterion variable. Percent oxygen uptake, heart rate and metabolic acidosis were determined at 60, 70, and 80% of max heart rate on a bicycle ergometer test (N=31). At 60 and 70% of max heart rate only one individual was definitely in metabolic acidosis. At 80% max heart rate 17 subjects were working at a level above the point of metabolic acidosis while 14 were working at or below this point. Thus, it was suggested that even if subjects are exercising at the same relative percent maximum HR, the metabolic stress using metabolic acidosis as the criterion is not constant across subjects. It was further shown that the regression of percent {Mathematical expression}O2 max on percent max HR was a spurious one resulting in poor prediction of individual {Mathematical expression}O2 values. The data presented suggest that the relative percent concept for equating exercise or subsequent training intensity needs careful re-evaluation.

KW - Anaerobic threshold

KW - Exercise

KW - Intensity

KW - Metabolic acidosis

KW - Training

KW - {Mathematical expression}O max

UR - http://www.scopus.com/inward/record.url?scp=0018176874&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0018176874&partnerID=8YFLogxK

U2 - 10.1007/BF00421445

DO - 10.1007/BF00421445

M3 - Article

C2 - 710387

AN - SCOPUS:0018176874

VL - 39

SP - 219

EP - 227

JO - European Journal of Applied Physiology

JF - European Journal of Applied Physiology

SN - 1439-6319

IS - 4

ER -