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Cited by 363Cardiovascular and exercise physiologySports Performance and TrainingMuscle metabolism and nutrition

Muscle respiratory capacity and fiber type as determinants of the lactate threshold

Ivy, J. L., Withers, R. T., Van Handel, P. J., Elger, D. H., Costill, D. L.·1980·Journal of Applied Physiology
DOI 10.1152/jappl.1980.48.3.523
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Abstract

This study examined the relationship between the respiratory capacity of an individual's skeletal muscle and the work rate at which blood lactate accumulation begins (lactate threshold). Comparisons were also made among fiber type, VO2max, and the lactate threshold. Muscle biopsies were taken from the vastus lateralis muscle for determination of respiratory capacity and fiber type (myosin ATPase). The lactate threshold was assessed in terms of both the absolute work rate (VO2) and relative work rate (%VO2max). The capacity of muscle homogenates to oxidize pyruvate was significantly (P less than 0.01) related to the absolute (r = 0.94) and relative (r = 0.83) lactate thresholds. Significant positive correlations (P less than 0.01) were also found between the percent of slow-twitch fibers and absolute (r = 0.74) and relative (r = 0.70) lactate thresholds. The results suggest that the muscle's respiratory capacity is of primary importance in determining the work rate at which blood lactate accumulation begins. They also suggest that the proportion of slow-twitch fibers may play an important role in determining the relative lactate threshold.

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Crossref · 10.1152/jappl.1980.48.3.523

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  • The fraction of VO2max that can be sustained for a given exercise duration is rarely greater than 90% in distance events.

    “The fraction of VO 2 max that can be sustained for a given exercise duration, which is rarely >90% VO 2 max in distance events, is related to muscle oxidative capacity (Gollnick & Saltin, 1982;Ivy et al., 1980)”

    From Contemporary Nutrition Strategies to Optimize Performance in Distance Runners and Race Walkers (2019) · cites this paper as Ivy et al., 1980

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Authors
Ivy, J. L., Withers, R. T., Van Handel, P. J., Elger, D. H., & Costill, D. L.
ORCID
Ivy, J. L.
Venue
Journal of Applied Physiology
Publisher
American Physiological Society
Published
1980-03-01
Volume
48
Issue
3
Pages
523-527
ISSN
  • 0161-7567 (ISSN-L)
  • 8750-7587
  • 1522-1601
DOI
10.1152/jappl.1980.48.3.523
OpenAlex
W1916968402
Cited by
363
References
24
Citations by year
2026: 1 · 2025: 4 · 2024: 5 · 2023: 7 · 2022: 12 · 2021: 6 · 2020: 3 · 2019: 7 · 2018: 12 · 2017: 5 · 2016: 5 · 2015: 9 · 2014: 5 · 2013: 7 · 2012: 9
FWCI
21.95
Type
journal article
Language
en
Open access
closed
Locations
  • Journal of Applied Physiology (publishedVersion)
  • PubMed (publishedVersion)
Topics
  • Health Sciences › Medicine › Complementary and alternative medicine › Cardiovascular and exercise physiology
  • Health Sciences › Medicine › Orthopedics and Sports Medicine › Sports Performance and Training
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Cell Biology › Muscle metabolism and nutrition
Keywords
lactate threshold, muscle fiber type, type I muscle fibers, pyruvate oxidation, myosin ATPase, VO2max, blood lactate accumulation, vastus lateralis
MeSH terms
Adult, Humans, Lactates, Male, Muscle Contraction, Muscles, Oxygen Consumption

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