Waist Exercise · Medicine Ball

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Assisted Motion Russian Twist

Assisted motion russian twists use a medicine ball and a guided or supported setup to keep the twisting pattern controlled, which is useful for beginners still learning to rotate through the trunk rather than yanking with the arms. The obliques do the real work here, not the shoulders. Keep the feet grounded or lifted consistently rather than switching mid-set, since that changes the difficulty.

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Category

Waist

Equipment

Medicine Ball

Target

Abs

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Exercise reference published by PlanWorkouts; see our editorial standards.

How to Do the Assisted Motion Russian Twist

1. Sit on the floor with your knees bent and feet flat on the ground.
2. Hold a medicine ball with both hands in front of your chest.
3. Lean back slightly, bracing your abs while keeping your back straight.
4. Slowly rotate your torso to the right, moving the ball toward the right side of your body.
5. Pause briefly, then rotate your torso to the left, bringing the ball to the left side of your body.
6. Keep alternating sides for your desired number of repetitions.

Technique & Form Tips

Focus on trunk flexion, rotation, or anti-movement stability as required by your specific variation. Maintain the suggested pelvic and spinal orientation to keep tension focused on the abdominal area throughout each repetition or hold.

Common Mistakes to Avoid

• Copying the wrong trunk action: Follow the demonstrated movement. A held plank, rotation and crunch require different actions rather than the same repeated trunk curl.
• Lower back arching: Keep the spine controlled to prevent the lower back from hyperextending under the load.
• Excessive speed: Perform movements with deliberate control rather than relying on rapid, bouncing motions.

How to Breathe During This Exercise

Maintain a steady breathing rhythm during the effort.

Comfort and Control

Choose a load and range you can control. Stop if the movement causes pain. If discomfort persists, stop and ask a qualified professional about an appropriate exercise and range.

General guidance: Mayo Clinic on weight-training technique. Follow the specific movement steps above for this variation.

Muscles Worked

The Assisted Motion Russian Twist mainly targets your Abs, with your Obliques helping support the movement, along with your Lower Back.

More Waist Exercises

3/4 Sit-Up Body Weight · Abs 45° Side Bend Body Weight · Abs Air Bike Body Weight · Abs Alternate Heel Touchers Body Weight · Abs Arm Slingers Hanging Bent Knee Legs Body Weight · Abs Arm Slingers Hanging Straight Legs Body Weight · Abs

More Abs Exercises

Arms Overhead Full Sit-Up (male) Body Weight · Abs Assisted Hanging Knee Raise Assisted · Abs Assisted Hanging Knee Raise With Throw Down Assisted · Abs Assisted Lying Leg Raise With Lateral Throw Down Assisted · Abs Assisted Lying Leg Raise With Throw Down Assisted · Abs Assisted Prone Rectus Femoris Stretch Assisted · Abs

Equipment Alternatives

Don't have medicine ball? These target the same abs with different equipment.

Arms Overhead Full Sit-Up (male) Body Weight · Abs Assisted Hanging Knee Raise Assisted · Abs Band Alternating V-Up Band · Abs Barbell Press Sit-Up Barbell · Abs

FAQ

What muscles does the Assisted Motion Russian Twist work?

The Assisted Motion Russian Twist mainly works your abs. It also helps strengthen your obliques and lower back. Using good, smooth form makes sure you work the right muscles and avoid unnecessary strain on your joints.

What equipment do I need for the Assisted Motion Russian Twist?

You do the Assisted Motion Russian Twist with a medicine ball. Make sure your equipment is set up safely before starting. If you work out at home or have limited gear, check out our alternative exercises below.

What form mistake should I watch for on the Assisted Motion Russian Twist?

One mistake to watch for is copying the wrong trunk action: Follow the demonstrated movement. A held plank, rotation and crunch require different actions rather than the same repeated trunk curl.. Use a comfortable range and a controlled return; reduce the load if you cannot maintain the demonstrated setup.

How many sets and reps should I perform on the Assisted Motion Russian Twist?

Use a short set of controlled repetitions, or a manageable hold when the movement is static. Stop when you cannot maintain the demonstrated position. Build control before adding duration, repetitions or resistance; the appropriate amount depends on the exercise and your experience.

What's a good alternative to the Assisted Motion Russian Twist?

The Arms Overhead Full Sit-Up (male) trains your abs with body weight and a similar movement pattern. Review its form guide before substituting it, since setup and range of motion can differ.