Core Stabilizers
Exercises that target the core stabilizers, grouped by whether they stretch or strengthen it.
The core stabilizers are the deep muscles that encircle and support the trunk — the transversus abdominis, obliques, multifidus, diaphragm, and pelvic floor. Rather than producing big movements, they stiffen the spine and pelvis so the limbs have a stable base to work from.
When this deep system is under-active the larger muscles over-brace, the pelvis loses its neutral position, and the low back takes more load — a common thread in sway-back posture and recurrent low-back tightness.
They respond to low-load control drills — dead-bugs, bird-dogs, planks, and breathing-integrated bracing — before heavier loading. See the core exercises.

Strengthen the core stabilizers
Quadruped Glute KickbackSupine Band-Assisted Eccentric Hamstring DrillKnee-to-Chest BridgeNinja Box JumpPigeon-Position Rear-Leg Hip ExtensionSingle-Leg Rocker Board BalanceRocker Board SquatSwiss-Ball Bridge MarchSwiss-Ball-Supported Side-Lying Hip AdductionSingle-Leg DeadliftSwiss ball rock 'n' rollReverse Tabletop Hip LiftDead Bug with Posterior Pelvic TiltDead Bug with Band PulldownForearm Front PlankDouble-Leg Glute BridgeHip Flexor Seated RaiseIsometric Wall SitThera-Band Kicks (Dynamic Reflexive Stabilization)Standing Wall Hip-Abduction PressBanded Quadruped Hip ExtensionSingle-Leg Touchdown SquatNordic Curl (Eccentric)Quadruped Hip Abduction and ExtensionSingle-Leg Hip ThrustSingle-Leg Hip Thrust with Peak HoldSingle-Leg Deficit RDLDoor-Anchored Arabesque Calf RaiseStrap-Assisted Diagonal Back-Leg HoldStrap-Assisted Side-Leg HoldCross-Body Strap Standing Side Leg HoldSupported Standing Rear Leg Hold with Floor ReachStanding Hand-Held Strap Side Leg RaiseSupported Strap-Assisted Arabesque HoldSeated Single-Leg Band Press