The four most effective "belly fat killers"”

　　Traditional sit-ups do nothing to slim down your abs because they only strengthen your abdominal muscles in the wrong way. A fitness scientist from San Diego State University in the United States tested the effectiveness of 13 of the most popular abdominal exercises and finally summarized the 4 most effective "abdominal fat killers." To achieve the best results, you should choose 3 groups of these 4 exercises every day, and each group should last 15 minutes. The goal is to exercise until you break a sweat.

sit-ups  Lie flat on your back with your knees bent, hook your feet together on the head of the bed, put a towel behind your neck, pull one end with both hands, draw in your abdomen and lift your body, slightly away from the bed, and remain still.

ball lifting  Lie on your back, hold a tennis ball in your hand and stretch your arms toward the sky, straighten your legs together and hook your feet. Draw in your abdomen and lift your shoulders and head slightly off the bed without moving.

pedaling  Lie on the floor, press the floor with your lower back, put your hands behind your head, lift your knees to a 45-degree angle, and pedal with your feet so that your left ankle touches your right knee, and then your right ankle touches your left knee.

knee lift exercise  Sit on the edge of the chair, let your feet naturally drop to the ground, tighten your abdomen, lean back slightly, lift your feet a few centimeters off the ground, pull your knees toward your chest, and bend your upper body forward to maintain stability.； Then return your feet to their original position and repeat.