Aerobic exercises in gyms suitable for boys include spinning bikes and treadmills. If you just want to lose weight, don't do equipment and concentrate on aerobic exercise. Every time it takes more than 30 minutes, the longer the better. The longer the time, the more calories are consumed. But it is not enough for you to work hard in this area. The most important thing is to control your mouth, especially midnight snack. Eat 7 minutes full and don't eat snacks. Strictly speaking, losing 5 kg in the first week is not a problem.