Exercise guide
Rotate And Leg Lift Crunch
- Intermediate
- Compound
- Rep-based
- Shoulders
- Upper legs
- Waist
This compound core exercise targets the rectus abdominis and obliques through simultaneous trunk flexion and rotation, while the quadriceps and hip flexors are engaged to lift the legs. It is highly effective for developing rotational stability and a defined midsection.
Reviewed by the Crucible Fit team · Updated June 2026
Muscles worked
Setup
- Lie flat on your back on an exercise mat with your legs fully extended and feet together.
- Place your fingertips lightly behind your ears, keeping your elbows flared out wide to the sides.
- Engage your core by pressing your lower back firmly into the floor to eliminate any arching.
How to do it
- Exhale as you simultaneously lift one straight leg toward the ceiling and crunch your upper body off the floor.
- Rotate your torso to bring the opposite elbow toward the rising knee, focusing on the twist coming from your midsection.
- Inhale as you slowly lower both your leg and torso back to the starting position with controlled tempo.
- Alternate sides immediately, lifting the opposite leg and rotating the opposite elbow upward.
Form checklist
- Keep your lower back in contact with the floor at all times to protect the spine.
- Lead the rotation with your shoulder rather than pulling on your neck with your hands.
- Keep your legs as straight as possible to maximize quadriceps and lower ab engagement.
- Maintain a slow, rhythmic pace to avoid using momentum.
Pro tips
- For maximum oblique activation, try to bring your shoulder toward the opposite hip rather than just reaching with the elbow.
- Keep the non-lifting leg hovering two inches off the ground throughout the set to maintain constant tension on the core.
Make it harder
- Perform the movement while wearing ankle weights to increase the load on the hip flexors and lower abs.
- Slow down the lowering phase to a 3-second count to increase time under tension.
Frequently asked
- What muscles does the rotate and leg lift crunch work?
- The rotate and leg lift crunch primarily targets the abs and obliques, and also works the erector spinae and serratus anterior as secondary muscles.
- What equipment do you need for the rotate and leg lift crunch?
- The rotate and leg lift crunch requires no equipment — just your body weight.
- Is the rotate and leg lift crunch good for beginners?
- The rotate and leg lift crunch is rated intermediate. Build a base with simpler variations first, then progress to it with light load and strict form.