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Updated: Jun 23, 2026

Measurement of Mitochondrial Respiration in Human and Mouse Skeletal Muscle Fibers by High-Resolution Respirometry
Published on: October 4, 2024
Steady exercise removes VO(2max) difference between mitochondrial genomic variants
Ana Marcuello1, Diana Martínez-Redondo, Yahya Dahmani
1Departamento de Bioquímica y Biología Molecular y Celular y CIBER de Enfermedades Raras, Universidad de Zaragoza, 50013 Zaragoza, Spain.
Mitochondrial DNA variants affect VO2max, but regular exercise training can eliminate this genetic influence. This finding has implications for athletic performance and understanding muscle conditions.
Area of Science:
- Exercise Physiology
- Genetics
- Sports Science
Background:
- Mitochondrial variants are known to influence maximal oxygen uptake (VO2max).
- The impact of regular exercise on this genetic predisposition is not fully understood.
Purpose of the Study:
- To investigate if steady exercise training can modify the influence of mitochondrial genetic variants on VO2max.
- To compare VO2max levels across different training groups and mitochondrial variants.
Main Methods:
- Determined mitochondrial genetic variants in healthy controls (CON) and athletes (aerobic training - AER, and anaerobic training - NoAER).
- Assessed VO2max using a maximum graded exercise test (GXT) on a cycle-ergometer.
- Analyzed data from 70 CON and 77 male Spanish Caucasian athletes.
Main Results:
- VO2max was significantly higher in Non-J individuals compared to J individuals within the CON group (P=0.007).
- Both AER and NoAER groups exhibited higher VO2max than CON.
- No significant differences in VO2max were found between mitochondrial variants within the athlete groups.
Conclusions:
- The study confirms the influence of mitochondrial DNA (mtDNA) variants on VO2max.
- Steady exercise training appears to mitigate or remove the influence of mtDNA variants on VO2max.
- These findings suggest potential applications in sports training and understanding muscle pathologies.
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