The combination of exercise and diet offers the most flexible and effective approach to weight control. If you are doing a regular program of strength training, your muscles will increase in weight, and possibly your overall weight will increase. Body composition is a better indicator of your condition than body weight. Lack of physical activity causes muscles to get soft, and if food intake is not decreased, added body weight is almost always fat. As a general rule, you should wear lighter clothes than temperatures might indicate.
Exercise generates great amounts of body heat.
Light-colored clothing that reflects the sun's rays is cooler in the summer, and dark clothes are warmer in winter. When the weather is very cold, it's better to wear several layers of light clothing than one or two heavy layers. The extra layers help trap heat, and it's easy to shed one of them if you become too warm. In cold weather, and in hot, sunny weather, it's a good idea to wear something on your head. Wool watch or ski caps are recommended for winter wear, and some form of tennis or sailor's hat that provides shade and can be soaked in water is good for summer.