The "hugging muscle" refers to the pectoralis major and pectoralis minor, commonly known as the pecs. These muscles are located in the chest and play a crucial role in arm movement, shoulder stability, and breathing.
When you hug someone, these muscles contract to draw your arms towards your body. They are essential for a variety of other activities as well, such as pushing, pulling, and lifting.
To maintain strong "hugging muscles," exercises like push-ups, modified push-ups, chest flies, and chest presses are recommended.