Mark Sisson against marathoners and his injuries as a marathoner (walking and sprinting ok) www.marksdailyapple.com www.marksdailyapple.com www.marksdailyapple.com What does it boil down to then? Simple activity whatever floats your boat. Dancing (line, club, ballet, etc.), outdoor hikes, pleasant bike rides, vigorous gardening, brisk walks, a light swim, rollerblading in the park, ice skating, yoga, some doubles badminton or tennis, a game of Ultimate, playing or just mowing the lawn. In short: leading an overall active life by working in low level aerobic exercise into the daily pattern of your life, your relationships and your free time fun. Its the good life, Id say.