The term "tummy muscles" refers to the group of muscles in the abdominal region that include the rectus abdominis, external obliques, internal obliques, and transverse abdominis. These muscles play a crucial role in maintaining posture, supporting the spine, and facilitating movement. There are several synonyms for the term "tummy muscles" that are commonly used, such as abdominal muscles, core muscles, stomach muscles, abdominal wall, and abs. These terms are often used interchangeably, and refer to the same group of muscles that are essential for overall health and fitness. Incorporating exercises that target the tummy muscles can help improve strength, balance, and flexibility.