Exercise guide
Half Kneeling Torso Twist
- Intermediate
- Compound
- Rep-based
- Waist
This exercise builds rotational core strength and spinal mobility by isolating the obliques while the lower body remains stabilized. It is highly effective for improving trunk control and hip stability simultaneously.
Reviewed by the Crucible Fit team · Updated June 2026
Muscles worked
Setup
- Lower yourself into a half-kneeling position with your right knee on the floor and your left foot flat in front, both knees bent at 90 degrees.
- Tuck your pelvis slightly and squeeze your right glute to stabilize your hips.
- Extend your arms straight out in front of your chest at shoulder height, pressing your palms together.
- Maintain a tall, neutral spine with your gaze fixed straight ahead.
How to do it
- Exhale as you slowly rotate your torso and arms toward the left (the side of the front leg) as far as your mobility allows without moving your hips.
- Inhale and slowly return to the center starting position with control.
- Keep your arms locked straight and ensure the movement originates from your ribcage, not just your shoulders.
- Perform all repetitions on one side before switching your leg position and rotating to the opposite side.
Form checklist
- Keep your hips facing forward like headlights; do not let them rotate with your torso.
- Ensure the front knee stays stacked directly over the ankle and does not cave inward.
- Maintain a vertical spine throughout the movement; avoid leaning forward or backward.
- Keep your shoulders depressed and away from your ears.
Pro tips
- Imagine your spine is a fixed axis and you are rotating around it to maximize oblique recruitment.
- Squeeze the glute of the kneeling leg throughout the set to create a 'stable base' for the upper body to rotate against.
Make it harder
- Narrow your base of support by placing your front foot directly in line with your back knee to challenge your balance.
- Pause for 2 seconds at the peak of the rotation to increase time under tension for the obliques.
Frequently asked
- What muscles does the half kneeling torso twist work?
- The half kneeling torso twist primarily targets the abs and obliques, and also works the erector spinae, glutes, and quadriceps as secondary muscles.
- What equipment do you need for the half kneeling torso twist?
- The half kneeling torso twist requires no equipment — just your body weight.
- Is the half kneeling torso twist good for beginners?
- The half kneeling torso twist is rated intermediate. Build a base with simpler variations first, then progress to it with light load and strict form.