today he makes the family a healthy dinner every single night. yep every night. and so today at 50 years old, mary claire is thinner than she was a decade ago. but she swears her secret to staying thin is more than just that saintly husband. i can t wait to get outside. reporter: she plays volleyball with her son. jumps on the elliptical in the garage or walks and vents with a neighbor every day. they spend mere ten minutes of fast walking. it boosts your energy for two hours. 30 minutes of exercise a week reduces depression. which is key to this age group? a shocking one in four middle-aged women are on antidepressant. one in five say they don t have enough energy to get through the day. mary claire says she has been there. but by making small changes, she is making sure her best days are on the horizon. sharyn alfonsi, abc news, new york. all right, well, i m not going to judge, but if my husband cooked me dinner every