You don't have to exercise till your drenched in sweat to get all the benefits related to exercise. 30-45 minutes of cardio (even if it is just walking) a couple days a week can have huge benefits on your overall health and can help prevent certain diseases. Not to mention can help weight loss.
Women who compete in fitness shows look older because they tan a lot to bring out muscle definition. Not to mention some take steroids because women cannot gain muscle mass like men can.