What types of exercises are most effective for losing weight?

Losing wt. Aerobic types of exercise--treadmills, steppers, running, cycling are great at helping you to burn more calories. Research has proven it takes at least 5 hours of "sweating types of exercise a week" to lose weight through exercise. The main to lose weight is to eat less food- calories. Exercise is important is an addition to less calorie intake; but even more important in the maintaining wt loss.