If you would, for a moment, indulge in a thought experiment with me. We all have activities we enjoy, and things that we've invested a lot of time and energy into, that probably form the bulk of our training. Whether or not that training is, in the strictest sense, healthy is another question entirely. I've invested a ton of time in martial arts, for example, but I'm no longer certain it's good for my general health.
Anyway, my question is this: if you were to set aside your longtime habits and preferred activities and train solely for good health, what would you do?
Improving my diet and sleep would be my first priority, but regarding physical training...
I'd try to do several mini-Yoga sessions through the day, a la grease the groove: at least half a dozen sessions, no less than five minutes long, no more than fifteen minutes long.
I'd try to spend as much time outdoors as possible, emphasizing Maffetone running, hiking, riding my mountain bike, actually rowing (kayak, not machines), possibly swimming and taking an hour long walk every day after dinner.
I'd ditch barbells forever and use only bodyweight, sandbags and dumbbells/kettelbells/clubbells: more natural movement, relatively lighter loads, superior balance and propioceprion, unilateral and anti-rotation training, more focus on perfect, beautiful reps...
I'd switch disciplines and start to take more seriously my filipino martial arts training: stick and blade training is way less harder on the body and way more effective in a real situation. I'd still train striking and grappling once a week to maintain a decent level (not sucking too much at it), but trying to focus only on perfect technique and timing. Robb Wolf summed it up beautifully: "training in such a way that I could potentially get out of shape".