What the heck are you supposed to do on your rest days?? There are three main things: Move, move, oh, and every so often do absolutely nothing. "What?" You ask, "Then why aren't I at the gym?" Well you can be, but we've locked in on strength training which is only a piece of the whole picture. Our bodies evolved to pretty much move all the time. We evolved to squat sit, to walk and run great distances, to practice hobbies non-stop all day and to rest when it is time to rest. I call it intuitive resting. Basically you keep moving until your body rebels, and then you rest hard, you just lay down and watch the clouds overhead, or you sit at a fire and watch the flames, or in the modern sense you just watch a good show and move as much as a radish. For me, this happens every day around 12:45 pm and lasts until about 3:45/4:00 pm. For you it might be once a week, or once a month! But outside of that rest, you should be moving. So even when you're on your rest days there is no reason you shouldn't try to walk wherever you can go, dance across your kitchen, do yard work all day, or take up a sport of some kind. The major movements you need are some kind of mobility drill, some kind of heavy lifting, some kind of cardio, and a consistent walking regimen. Mobility is essential after about 25 years of age. Most of our joints need to be oiled in order to operate. There is very good reason you'll hear people say movement is medicine in this regard, and lifting alone will get you through a lot of the pains and open up deeper ranges of motion, but it is not enough to overcome them for good. So a good amount of explorative movement— weird stuff like tai chi or yoga will wake up those joints and allow them the fluid they need to stay mobile. And if you don't move them? Arthritis, calcium build up, gradually increasing joint pains. The heavy lifting you only need 2-3 times a week until you plateau, with a deep range of motion and progressively heavier weights over time.