[jacorreia]

This study shows a bit of what the general public really needs to understand about personal health: it's very hard to train multiple aspects of your fitness with only one type of activity.

Doing cardio makes you better at cardio. Strength training makes you stronger. Diet and hypertrophy improves your body composition.

You'll always hear people say "Oh your legs must be so strong from all those marathons you do." Entirely false, their cardio-vascular system is strong. I can virtually guarantee that any moderately dedicated powerlifter can squat more than a long-distance runner (form notwithstanding). Similarly, a marathoner's lean physique is a result of their diet, which they require in order to be successful at running, not because of their training.

I really wish that more people would take the time to sit down, identify their fitness goals, and ensure that their lifestyle is focused towards achieving their goals. For most people, all this is taking a good look at your diet!