We have a white tea towel in our upstairs bathroom that says this in bold, black capital letters: “I CAN’T BELIEVE I FORGOT TO GO TO THE GYM TODAY. THAT’S 7 YEARS IN A ROW.” It makes me laugh every time I see it, which is at least once or twice a day, not only because it’s funny, but also because it’s true. Neither one of us has ever been a gym rat or fond of fitness centers. For several years, we attended Jazzercise classes regularly three or four times a week. It was a fun way to socialize and get some exercise through dancing, light weight training and building…