DNA Sequence Variations Contribute to Variability in Fitness and Trainability

Genetic differences contribute to human variability in exercise-related traits. In this commentary, the focus is on endurance exercise performance and cardiorespiratory fitness (CRF). The evidence pertaining to other relevant traits (e.g., muscle strength) will not be considered. Three main topics are addressed to provide a brief summary of our current knowledge base. 1. There is a genetic component to cardiorespiratory fitness Studies in...