Most people don’t mind working out a bit, but are discouraged by the thought of exercising hard. The idea of sweating buckets is so daunting that they avoid exercising. Fortunately, exercise is not a matter of all or nothing. There is some reward at every level of effort, provided it is regular. Spend at least 30 minutes a day in action like brisk walking to errands climbing stairs, carrying heavy shopping or children, doing outdoor gardening. Your rewards will not be immediate, but you can expect a reduced risk of problems like brittle bones, heart disease and poor blood circulation. You work up a decent appetite and sleep well, but improvement in body-shape will be minimal. Light regular exercise helps your heart. Such activity can include anything from brisk walking, jogging, cycling, and swimming, any light sport or even disco dancing. The reward is immunity to colds and flu, less stress, slightly healthier levels of cholesterol and blood pressure. The figure trims down a little but only gradually.