Dumbbell bird, do more groups, each group should have more times, and play less computer. Sitting in front of the computer for a long time is easy to hunch over and hurt your eyesight. There is also the need to use abdominal muscles to support waist strength, practice sit-ups, stand up, run more, 1.5 hours a day, run 10 minutes, walk 10 minutes, and you can't relax.