How can I train my belly to inflate bigger on a daily basis?

Practice diaphragmatic breathing. This is a type of breathing exercise that can help to strengthen the diaphragm and abdominal muscles, making them more efficient in expanding your stomach.

Eat smaller meals more often throughout the day. This can help to promote a larger appetite and help you to eat more throughout the day, which can result in a larger stomach.

Include full body exercises into your workout. Exercises such as burpees, mountain climbers, and squats with weighted plate can help to target the abdominal muscles and promote more growth.

Try resistance training. Adding resistance bands or light weights to your resistance training program is an effective way to promote abdominal muscle growth.

Have regular stretching and relaxation sessions. Lying down on your back with your legs up in the air for several minutes can help to relax your abdominal muscles and promote growth.