Three of four active runners sustain injuries, mostly in the knee and lower leg. (sciencedaily.com)
Effects of High - Intensity Training and Continuous Endurance Training on Aerobic Capacity and Body Composition in Recreationally Active Runners. (leangainsguide.com)
If you are physically very active you may want to adjust: A very active runner, for example, should lower the amount of fat a bit, while a weightlifter can benefit from increasing his daily protein. (evilcyber.com)