There has been much debate about whether diet or exercise is more important for weight loss. There are obvious benefits for both changing dietary patterns and for starting an exercise regimen. A new study published in International Journal of Sport Nutrition & Exercise Metabolism shows that weight loss is most effective when diet and exercise are combined. Subjects who did both reduced the most body bad and preserved the most muscle compared to just dieting or just exercising. So to look your best, watch what you eat and hit the gym!