So if you’re 30-years-old, and workout five days a week, you need to do 15 minutes of maintenance at least five days a week. — Maybe I’m delusional. Maybe every year we age, things really do just fall apart. Bones crumble into dust, muscles tear into pieces, and the mind dwindles into … I don’t know — pudding. Or not. Perhaps we can keep our strength, speed, coordination, and intelligence. Or at least most…