The heritability of VO2max in sedentary individuals and one's ability to improve VO2max as a result of endurance exercise training is approximately . This finding is supported, in part, by the , one of the first and largest studies conducted to date investigating genetics and exercise training responses. 75% | Heritage Family study 15-20% | Heritability of VO2max study 47-50% | Heritability Genetics Family study 15-20% | Heritage Family study 47-50% | Heritage Family study