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- Title
Sex Differences in Maximal Oxygen Uptake Adjusted for Skeletal Muscle Mass in Amateur Endurance Athletes: A Cross Sectional Study.
- Authors
Martins, Higgor Amadeus; Barbosa, José Geraldo; Seffrin, Aldo; Vivan, Lavínia; Souza, Vinicius Ribeiro dos Anjos; De Lira, Claudio Andre Barbosa; Weiss, Katja; Knechtle, Beat; Andrade, Marilia Santos
- Abstract
Male athletes tend to outperform female athletes in several endurance sports. Maximum cardiac output can be estimated by maximal oxygen consumption ( V ˙ O 2 m a x ), and it has been established that men present V ˙ O 2 m a x values about 20% higher than women. Although sex differences in V ˙ O 2 m a x have already been well studied, few studies have assessed sex differences with regard to muscle oxidative capacity. The aim of this study was to compare aerobic muscle quality, accessed by V ˙ O 2 m a x and adjusted by lower limb lean mass, between male and female amateur triathletes. The study also aimed to compare sex differences according to V ˙ O 2 submaximal values assessed at ventilatory thresholds. A total of 57 participants (23 women and 34 men), who had been training for Olympic-distance triathlon races, underwent body composition evaluation by dual-energy X-ray absorptiometry and performed a cardiorespiratory maximal test on a treadmill. Male athletes had significantly higher V ˙ O 2 m a x , both absolutely and when adjusted to body mass. Conversely, when V ˙ O 2 m a x was adjusted for lean mass, there was no significant difference between sexes. The same was observed at submaximal exercise intensities. In conclusion, differences in V ˙ O 2 m a x adjusted to body mass but not lean mass may explain, at least in part, sex differences in performance in triathlons, marathons, cycling, and other endurance sports.
- Subjects
AEROBIC capacity; BODY composition; SKELETAL muscle; CROSS-sectional method; ANTHROPOMETRY; PHYSICAL fitness; ATHLETES; SEX distribution; T-test (Statistics); MUSCLE strength; RESEARCH funding; DATA analysis software
- Publication
Healthcare (2227-9032), 2023, Vol 11, Issue 10, p1502
- ISSN
2227-9032
- Publication type
Article
- DOI
10.3390/healthcare11101502