Strength training (e.g. lifting weights). I will be anecdotal and tell my own story. I started at about 30, having virtually no experience in the weight room. I

Strength training (e.g. lifting weights). I will be anecdotal and tell my own story. I started at about 30, having virtually no experience in the weight room. I was very intimidated, but took it as a challenge. That was generally unfounded and I have found people in the gym to be (while reserved) generous and non-judgmental. I still go in the morning, though, because having a crowded room throws me off. After beginning to lift, minor pain that I was experiencing in my wrist and back disappeared. I'm now focusing on my posture a lot because I realize I'm basically too weak to sit or stand up straight all day. It has also taught me basic things like how to pick something up. I cringe every time I see some one bend over at the waist and arch their back. People can throw out their backs picking up very light objects. I highly recommend the book The New Rules of Lifting. Supplement by watching you tube videos about particular motions. Start off slowly. If you can afford it, consider a trainer. But I am a DIY type, as I imagine many here are. Eat right (I generally ignore weight lifting diet advice and try to follow the advice in Eat Drink and Be Healthy: The Harvard Medical School Guide, which generally advises a Mediterranean-style diet and is based on aggregating data from several of the most long-term studies of diet). Make sure you are sleeping well.