Lie on back, knees bent. Flatten your low back into the floor by tilting the pelvis up. Trains neutral-spine awareness — the foundation of every other back-rehab exercise.
Secondary muscles
glutes
lower back
Form cues
1Squeeze glutes lightly to drive the tilt
2Hold the flat-back position 5 sec, release
3Belly stays soft — this is pelvic motion, not crunches
Common mistakes
⚠Lifting the hips off the floor (that's a bridge, not a tilt)