It really just depends what you're training for. In running, for example, Usain Bolt probably doesn't run more than about 15-20 miles per week, but Mo Farah does about 115-120. This "problem" is the same reason BMI is a stupid gauge of health ... unless you're in the fat part (no pun intended) of the bell curve. I'm primarily a runner and my daily runs are in the 50-60 minute range, with short speed workouts and longer, slower long runs, but I augment with bodyweight core & swimming during the week, too (and indoor cycling in the winter). But my goals are not at all the same as yours or anyone else's, so ymmv.