[Lying Flat Abdominal Crunch] is a single exercise for the rectus abdominis, which can comprehensively exercise the abdominal muscles and consume excess abdominal fat. 1. Lie on your back, bend your knees naturally, tuck your chin slightly, and slowly tighten your rectus abdominis. 2. Use abdominal strength to lift the shoulders. This action only requires the shoulder blades to leave and return to the ground, and the lower waist never leaves the ground. Exhale when rolling up and inhale when returning. Pay attention to the lumbar spine not to leave the plane, just leave the middle and upper part of the back.
