It’s not your six-pack. It’s not your obliques. It’s your transverse abdominis (TVA)— your deep, corset-like core muscle that stabilises your spine and pelvis from the inside out. When this muscle is underactive or misfiring, you might feel: 🚫 Wobbly through your seat 🚫 Overly tight or grippy through your thighs 🚫 Strain through your lower back or hips 🚫 Like you’re “bracing” just to sit the trot This muscle is key for: ✅ Maintaining even pressure through your seat bones ✅ Staying softly upr