Mizuno, a famous sports manufacturer, has developed a chair that allows you to easily do abdominal exercises at home. "Jitsu wa! Fukkin-kun RX" (Actually! Abdominal Muscle-kun RX) You can easily do abdominal exercises and also use it as a regular chair. Comfortable mesh fabric. Compared to other companies' abdominal exercise chairs, it is lighter, making it easier to move around the room and carry to the second floor.