It’s astonishing how quickly you can abandon a good habit.

I spent the fall and winter building one small but important habit: lifting free weights for 10-15 minutes, three or four times a week. I want to be a healthy person, and I know that as I age, my risk of developing osteoporosis increases. Plus I don’t want to develop too much floppy flesh under my arms. Some moderate weight training can help prevent (or at least delay) both those developments.