the most shocking part of the paper is that variety predicts mortality independent of total volume 19% lower all-cause mortality from doing 3-4 different activities instead of one. after adjusting for how much you exercise, the number of different things you do consistently still predicts whether you live or die at the same total exercise volume, the person mixing walking, tennis, weights outlives the person doing equivalent hours of just one your body responds to varied movement patterns because different systems are stimulated cardio doesn't fully overlap with strength doesn't fully overlap with balance go to the gym, go on a walk, play a sport on the weekend