The Weighted Russian Twist (legs up) is a core rotation exercise that primarily targets the obliques, with the iliopsoas and quadriceps working to hold the legs elevated and the rectus abdominis bracing throughout. Performed with a dumbbell, plate, or medicine ball, it builds rotational strength and core stability without the anchor of a foot brace.
Cómo hacer el Weighted Russian Twist (legs up)
- 1Sit on the floor with your knees bent and feet flat. Hold a dumbbell, plate, or medicine ball with both hands at chest height.
- 2Lean back until your torso is at roughly a 45-degree angle to the floor, engaging your core to maintain the position.
- 3Lift your feet off the floor and bring your shins to a position roughly parallel to the floor, knees bent at about 90 degrees.
- 4Brace your core and gently press your lower back toward the floor to stabilize your spine.
- 5Rotate your torso to the right, bringing the weight toward your right hip without letting your legs drop.
- 6Return through center and rotate to the left in a controlled arc, keeping the weight close to your body.
- 7Continue alternating sides for the target number of repetitions, then lower your feet and sit upright to finish the set.
Consejos de técnica
- Initiate the rotation from your ribcage and thoracic spine rather than swinging the weight with your arms.
- Keep the weight close to your body throughout the movement — extending your arms forward lengthens the lever arm and shifts stress to the lower back.
- Exhale as you rotate to each side and inhale as you pass through center to maintain intra-abdominal pressure.
- Start lighter than you expect — the legs-up position is inherently less stable than the feet-on-floor variation, so the same load will feel significantly harder.
- If your lower back rounds excessively, reduce the lean angle until your core can maintain a neutral spine before adding more weight or range.
Errores comunes
- Letting the legs drop during rotation, which removes the hip flexor demand and shifts unwanted stress to the lower back.
- Using momentum to swing the weight rather than rotating under control, which reduces oblique engagement and risks spinal injury.
- Rounding the lower back instead of holding a neutral spine, which compresses the lumbar discs under load.
- Holding the weight with extended arms instead of close to the chest, which increases the lever arm and overloads the spine.
- Rushing through reps, which prevents full rotation to each side and limits time under tension for the obliques.
Preguntas frecuentes
What muscles does the Weighted Russian Twist (legs up) work?
The primary target is the obliques. The iliopsoas and quadriceps work as synergists to keep the legs elevated, and the rectus abdominis braces the spine throughout the movement.
How does the legs-up position differ from the standard Russian Twist?
With feet on the floor you have a stable anchor that reduces the demand on your hip flexors and core. Lifting your legs removes that anchor, forcing the iliopsoas and quadriceps to hold the position and increasing the overall stability demands on the entire core.
What weight should I use for this exercise?
Start lighter than you expect. The legs-up position is less stable, so a load that feels manageable in a seated position will feel noticeably harder here. A dumbbell, weight plate, or medicine ball all work equally well — choose whichever you can grip comfortably.
How far back should I lean?
Roughly 45 degrees is a common starting point. The further you lean, the more difficult the movement becomes. Lean only as far as you can while maintaining a neutral spine — if your lower back rounds significantly, reduce the angle.
Can I keep my legs fully extended instead of bent at 90 degrees?
Yes. Straightening the legs increases the lever arm, which makes the hip flexors and quadriceps work harder and raises the overall difficulty. Master the bent-knee version with good spine control before progressing to straight legs.
