Transversus abdominis
TVA · Core
- Origin
- Lower costal cartilages, thoracolumbar fascia, iliac crest and inguinal ligament
- Insertion
- Linea alba and pubic crest
- Action
- Compresses the abdomen and stabilises the lumbar spine
The deepest abdominal muscle, wrapping the waist like a corset. It does not move the spine but braces it, which is the goal of planks and hollow holds.