Sit-Up Twist

Sit-Up Twist trains the abdominal muscles by bringing the rib cage and pelvis closer together through a controlled range.

Primary muscle

Abs

Primary musclesInternal and external obliques

Secondary musclesTransverse abdominis, Rectus abdominis, Erector spinae, Gluteal muscles

Equipment

Bodyweight

How to perform Sit-Up Twist

Follow the sequence in order, paying attention to the starting position, movement path, and finish described in each step.

Lie on the back with the knees bent, feet planted, and hands together in front of the chest.
Brace the abdomen and curl into a sit-up without using arm momentum.
Near the top, rotate the rib cage toward one side while the pelvis and knees remain still.
Return to the centre before lowering the torso under control.
Repeat the sit-up and twist toward the opposite side, alternating evenly.

Keep the knees aligned; if the hips turn with the rib cage, pivot the feet instead of twisting through planted knees.

Move through a smooth trunk range rather than throwing the arms or load from side to side.

Stop before the resistance drags the ribs away from a stable pelvis.

Maintain the same seated trunk angle throughout both directions.

Twisting through the knees: Keep the knees aligned; if the hips turn with the rib cage, pivot the feet instead of twisting through planted knees.
Forcing end range: Stop before the resistance drags the ribs away from a stable pelvis.
Stop when the exercise produces sharp, catching, radiating, or increasing joint pain rather than the expected muscular effort.
Alternative Pallof press: Train the trunk to resist rotation before producing a larger rotational range.

Place Sit-Up Twist after the main compound lifts, in a focused core block, or beside an exercise that does not require a fresh trunk.

Use two to four times per week while accounting for trunk work already supplied by squats, hinges, carries, and overhead lifting.

Goal	Sets	Reps or time	Rest	Effort and execution
Control / technique	2–3	5–8 reps	45–75 sec	Stop well before position changes
Strength / endurance	2–4	8–15 reps	60–90 sec	Stop while 1–3 good-form reps are still possible

Use Sit-Up Twist after Barbell Back Squats or Deadlifts when the main strength work is complete.
Pair it with Dead Bug or Cable Pallof Press to train the core through complementary movement patterns.

Scale the movement