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Anaerobic threshold and maximal aerobic power for three modes of exercise

Davis, J. A., Vodak, P., Wilmore, J. H., Vodak, J., Kurtz, P.·1976·Journal of Applied Physiology

Abstract

Alterations in selected respiratory gas exchange parameters have been proposed as sensitive, noninvasive indices of the onset of metabolic acidosis(anaerobic threshold (AT) during incremental exercise. Our purposes were toinvestigate the validity and feasibility of AT detection using routine laboratory measures of gas exchange, i.e., nonlinear increases in VE and VCO2 and abrupt increases in FEO2. Additionally, we examined the comparability ofthe AT and VO2 max among three modes of exercise (arm cranking, leg cycling, and treadmill walk-running) with double determinations obtained from 30 college-age, male volunteer subjects. The AT's for arm cranking, leg cycling, and treadmill walk-running occurred at 46.5 +/- 8.9 (means +/- SD), 63.8 +/- 9.0, and 58.6 +/- 5.8% of VO2 max, respectively. No significant difference was found between the leg exercise modes (cycling and walk-running) forthe AT while all pairwise arm versus leg comparisons were significantly different. Using nine additional subjects performing leg cycling tests, a significant correlation of r = 0.95 was found between gas exchange AT measurements (expressed as % VO2 max) and venous blood lactate AT measurements (% VO2 max). We conclude that the gas exchange AT is a valid and valuable indirect method for the detection of the development of lactic acidosis during incremental exercise.

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Authors
Davis, J. A., Vodak, P., Wilmore, J. H., Vodak, J., & Kurtz, P.
Venue
Journal of Applied Physiology
Published
1976-10-01
Volume
41
Issue
4
Pages
544-550
ISSN
  • 0161-7567 (ISSN-L)
  • 8750-7587
  • 1522-1601
OpenAlex
W2217332032
Cited by
471
References
0
FWCI
10.06
Type
journal article
Language
en
Open access
closed

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