The DOI matches its Crossref record; 24 of the 24 references it cites were found in a registry or an index.
Muscle respiratory capacity and fiber type as determinants of the lactate threshold
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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“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
Citations
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Metadata
- 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
- 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 › Physiology (medical) › Cardiovascular and exercise physiology
- Health Sciences › Medicine › Orthopedics and Sports Medicine › Sports Performance and Training
- Health Sciences › Nursing › Nutrition and Dietetics › 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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