Among the many areas to stretch, the abdomen is often overlooked.
However, for those with poor posture (such as a hunched back), the rectus abdominis muscle is often contracted, so stretching it feels good.

The method is simple: start by lying face down with your legs slightly apart.
From there, place your hands beside your chest and lift your upper body, arching your back.
Hold this position for 10 seconds while breathing slowly, then return to the starting position. Repeat this 3 times.

If this is painful, such as causing lower back pain, try using your elbows instead of your hands to reduce the angle at which you arch your back.

If that’s still difficult, you can stretch your rectus abdominis by placing a rolled-up bath towel under your lower back, lying on your back, and stretching with both arms raised towards your head.