Adjustable electroplating dumbbell set exquisite gift box is simple and popular, convenient to store, easy to carry; 7-layer electroplating process, not easy to rust, more wear-resistant; specifications: 15KG 20KG 30KG 50KG; free combination of barbell dumbbells; handle: arc massage The handle is simple and generous. Don't freeze your hands in winter. Sweat and slip in summer. Dumbbell connecting rod: 11cm-60cm connecting rod can be freely selected, instantly transforming into a barbell. The connecting rod can be freely selected. Use the connecting rod to change the barbell in a few seconds. Use dumbbells for free weight training. In normal exercises, you can use a barbell to lift heavy objects to practice squats. The heavier the weight, the greater the load, which means there are still a lot of muscles. Dumbbells are good auxiliary exercise equipment, and squats are suitable for your entire body. This is important training. Once you can squat with a weight of 120 kg, the quadriceps, biceps, buttocks and calf muscles needed to bounce will have a good exercise effect. The efficiency is better than pure jumping exercises. Therefore, dumbbell squats are used to train athletes in track and field, basketball, and volleyball. This is a free weight squat with the hips below the knee joint