I go to the gym 3 times a week, not because I enjoy it, I don't, but I feel I have to take on board all the advice we are given about the benefits of exercise and the harmful effects of not moving about. Once I'm there I spend half an hour or so walking very briskly on the treadmill, sometimes with an incline, but not always, and then I go on various load bearing weight apparatus. I was advised by an endocrinologist that using such machines is the best way to ward off osteoporosis which my mother suffered from in the last 10 years or so of her life and I take a fairly high does of thyroxine which can deplete bone density. Other than that we go for walks in the Royal Parks on our doorstep, Bushy and Richmond, or along tow paths by the nearby Thames, far more uplifting that the gym. I also try to walk to the shops if I'm not carrying too much, today I've had to drive to Sainsburys because I was buying quite a lot. I swim occasionally and I do yoga at home from tutorials on line although I have done classes in the past. My husband who is 10 years or so older than me is in very good shape from lots of walking round golf courses, he also goes to the gym, maybe a couple of times a week. We are both aware that we spend a lot of time slumped in chairs reading, or on line or watching tv.