December 1, 1986Medicine & Science in Sports & Exercise
Aerobic performance in brothers, dizygotic and monozygotic twins
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Discussion
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Implication
Randomized trial investigates genetic effects on aerobic performance in brothers and twins, suggesting significant heredity influence.
Key Points
- This study aims to examine the influence of heredity on aerobic performance among brothers and dizygotic and monozygotic twins.
- Participants included 42 brothers, 66 dizygotic, and 106 monozygotic twins aged 16 to 34.
- Aerobic performance measured through progressive ergocycle tests to obtain VO2 max, heart rate, and work output.
- Genetic effects were analyzed using within-pair estimations of genetic variance.
- Significant genetic variance found for all variables except VO2 max per kg of fat-free weight (P ≤ 0.05).
- Genetic effect sizes: 40% for VO2 max, 50% for heart rate, 60% for maximal oxygen pulse and ventilation, 70% for 90-min work output per kg.
- Monozygotic twins showed higher resemblance compared to dizygotic twins and brothers.
Cite This Study
Bouchard et al. (1986) studied this question.