The weighted Russian twist is a core strength exercise that directly targets the obliques, the muscles running along the sides of your torso. Performed seated with the torso leaned back and a weight held in both hands, it challenges your waist through rotational resistance. It is a staple for building rotational core strength and a defined midsection.
How to do the Weighted Russian Twist
- 1Sit on the floor with your knees bent and feet flat. Hold a weight plate, dumbbell, or medicine ball with both hands at chest height.
- 2Lean your torso back to roughly 45 degrees, keeping your spine long and chest lifted — not rounded.
- 3Brace your core and lift your feet a few inches off the floor, crossing your ankles to stabilize.
- 4Rotate your torso to the right, bringing the weight toward your right hip. Let your gaze follow the weight.
- 5Pause briefly at the end of the range, feeling the right oblique contract.
- 6Rotate through center and continue to the left side, bringing the weight toward your left hip. That is one full rep.
- 7Maintain a steady tempo — roughly 1 second per side — and keep your hips square and still throughout.
- 8Complete all reps, then lower your feet and return to the start position in a controlled manner.
Form tips
- Drive the rotation from your ribcage and shoulders, not your arms — think about turning your chest to face the wall beside you.
- Hold the weight slightly away from your chest rather than tight to your body; the extra moment arm increases oblique demand.
- Exhale as you rotate to each side to maintain intra-abdominal pressure and protect your lower back.
- If your lower back rounds or fatigues, reduce the lean angle (sit more upright) before reducing weight.
- Rotate only as far as you can go with the hips square — stop the rep when the pelvis starts to follow the weight.
Common mistakes
- Swinging the arms instead of rotating the torso — this shifts work away from the obliques onto the shoulders and arms, making the exercise far less effective.
- Rounding the lower back — flexing the lumbar spine under load places excessive stress on the intervertebral discs; always keep the spine neutral and chest tall.
- Moving too fast — using momentum to bounce the weight from side to side removes tension from the obliques and reduces the training stimulus.
- Letting the hips rock side to side — hip rotation compensates for limited thoracic mobility and means the obliques are doing far less rotational work than intended.
- Using too heavy a weight too soon — excessive load forces compromised posture and reduced range of motion; build up gradually to maintain full, controlled rotation.
Frequently asked questions
What muscles does the weighted Russian twist work?
The weighted Russian twist primarily targets the obliques — the muscles on the sides of your waist responsible for trunk rotation and lateral flexion. The added weight increases the rotational resistance and therefore the demand placed on these muscles.
Should I keep my feet on the floor or lift them during the weighted Russian twist?
Lifting your feet increases the stability challenge and reduces the base of support, forcing your core to work harder. However, beginners or anyone with lower back sensitivity should keep feet on the floor until they have built sufficient core control.
How heavy should the weight be for a Russian twist?
Choose a weight that lets you complete all reps with full rotation and a neutral spine. A plate, dumbbell, or medicine ball between 5–25 lb is common. Start light and increase only when your form is solid throughout the entire set.
Is the weighted Russian twist good for reducing waist size?
The weighted Russian twist strengthens and develops the oblique muscles, which can improve waist definition. Spot reduction of fat is not possible through any single exercise; overall body composition changes require a caloric deficit combined with consistent training.
How many reps and sets of weighted Russian twists should I do?
For core strength, 3–4 sets of 10–15 full reps works well, counting one rep as a rotation to both sides. Stop the set when your rotation shortens or your hips start to rock. Rest 45–90 seconds between sets.
