Medicine Ball Russian Twist (Legs-Up)

Medicine Ball Russian Twist (Legs-Up) Exercise Description

The Medicine Ball Russian Twist (legs-up) is a seated trunk-rotation drill that targets the obliques while the rectus abdominis and transverse abdominis brace to keep the spine stable. Holding the legs up increases the lever arm, demanding more lumbopelvic control and isometric work from the hip flexors without sacrificing a neutral lumbar position. The goal is controlled thoracic rotation—turning the ribcage and shoulders as a unit—while the pelvis and legs stay quiet. Keeping the medicine ball close to the sternum reduces shoulder strain and prevents excessive reach that can pull the spine out of alignment. Move through a comfortable, controlled range without bouncing or tapping the ball, maintaining steady breathing and a long spine throughout.

Muscle Groups: Abs, Obliques, Waist
Target Muscles: External Obliques, Internal Obliques
Assisting Muscles: Multifidus
Stabilizing Muscles: Iliacus, Psoas Major, Rectus Abdominis, Rectus Femoris, Transversus Abdominis
Body Area: Upper Body
Body Parts: Core
Body Surface: Side
Body Symmetry: Bilateral
Equipment: Medicine Ball
Exercise Patterns: Other
Exercise Type: Strength
Functional Grouping: Trunk Lateral Flexors, Trunk Rotators
Joint Involvement: Single-joint
Muscle Location: Deep Side Abs, Side Abs
Movement Direction: Rotational
Muscle Position: Lateral
Gender: Male

How To Do The Medicine Ball Russian Twist (Legs-Up) Exercise

‘- Sit on the floor, knees bent, holding the medicine ball at chest level.
– Lengthen your spine, stack ribs over pelvis, and gently retract/depress the shoulder blades.
– Brace your abdomen; hinge back slightly at the hips while keeping a neutral lumbar spine.
– Lift both feet so shins are roughly parallel to the floor; keep knees together.
– Keep the ball close to your sternum; wrists neutral, elbows softly bent.
– Rotate your ribcage and shoulders to one side; keep pelvis and legs still.
– Stop before the low back flexes or you lose trunk control.
– Rotate through center to the other side with the same controlled tempo.
– Breathe rhythmically—exhale as you rotate, inhale as you return to center.
– Avoid reaching the ball far from the body, tapping the floor, or rounding the back.
– If alignment is lost, reduce the rotation range or momentarily set the heels down, then reset posture.

Medicine Ball Russian Twist (Legs-Up) Tips

‘- Lengthen your spine and stack your ribs directly over your pelvis before you start rotating.
– Gently retract and depress your shoulder blades to help keep the upper body stable.
– Brace your abdomen, then hinge back slightly at the hips while keeping a neutral lumbar spine.
– Lift both feet so your shins are roughly parallel to the floor and keep your knees together.
– Keep the medicine ball close to your sternum with neutral wrists and softly bent elbows.
– Rotate your ribcage and shoulders together as a unit, keeping your pelvis and legs still.
– Move only through a range where your low back does not flex and you maintain trunk control.
– Use a controlled tempo without bouncing or tapping the ball on the floor.
– Breathe rhythmically—exhale as you rotate, inhale as you return to center.
– If you lose alignment, reduce your rotation range or briefly set your heels down and reset your posture.

Medicine Ball Russian Twist (Legs-Up) Beginner Introduction

The Medicine Ball Russian Twist (legs-up) is a floor-based core move that blends a reclined sitting position with elevated legs and steady upper-body rotation. Holding a medicine ball at the chest encourages the ribcage and shoulders to turn together, challenging the side abs while the rest of the midsection works to keep the spine from wobbling. With the legs lifted, the hip flexors share the load, adding extra demand on balance and control through the lower torso.

This exercise centers on smooth, deliberate motion rather than speed. The pelvis and legs remain quiet while the upper body gently rotates from side to side, with the ball traveling in front of the chest rather than reaching far away. That closer hold helps limit strain through the shoulders and reduces unwanted twisting in the lower back. Breathing usually stays calm and rhythmic, and the spine stays long, so the core, hip flexors, and side abs carry the work through a comfortable, controlled range of motion.