People with higher fitness and higher aerobic capacity have longer life 
expectancies compared to inactive people. Longer and better life can result from 
some genetic factors, as well as from higher physical capacities acquired during 
younger years. However, there are several studies proving the definitive role of 
life-long physical activity, too, which can be engaged in at any age. Even at 
very old ages, regular physical activity results in a lot of benefits, in high 
quality of life, in independence and longevity.