Exercise guide
Side Lying Cycle Oblique Tuck
- Intermediate
- Compound
- Rep-based
- Waist
This exercise targets the obliques and hip flexors by combining a lateral crunch with a cycling leg motion, significantly improving core stability and side-waist definition.
Reviewed by the Crucible team · Updated June 2026
Muscles worked
Setup
- Lie on your right side with your legs extended and stacked on top of each other.
- Prop your upper body up on your right forearm, ensuring your elbow is directly under your shoulder.
- Place your left hand lightly behind your head with the elbow pointing toward the ceiling.
- Lift both legs slightly off the floor to engage your core before starting the movement.
How to do it
- Exhale as you pull your left knee toward your chest while simultaneously crunching your left elbow down to meet it.
- Inhale and extend your left leg back out in a circular 'pedaling' motion, keeping the foot hovering just above the floor.
- Maintain a controlled 2-1-2 tempo, focusing on the deep contraction of the side abdominals at the top of the tuck.
- Complete all repetitions on one side before switching to the left side.
Form checklist
- Keep your chest open and avoid collapsing your shoulder into your neck.
- Ensure the movement comes from your waist, not just moving your arm and leg.
- Keep your hips stacked vertically; do not roll backward onto your glutes.
- Maintain constant tension by never letting the working leg touch the ground.
Pro tips
- Focus on the 'mind-muscle connection' by visualizing the space between your lower ribs and hip bone closing as you tuck.
- Point your toes during the extension phase to maximize the engagement of the quadriceps and hip flexors.
Make it harder
- Perform the movement from a full side plank position (supported by a straight arm) to increase the stability demand.
- Wear ankle weights to increase the resistance on the obliques and hip flexors during the cycling phase.
Frequently asked
- What muscles does the side lying cycle oblique tuck work?
- The side lying cycle oblique tuck primarily targets the abs and obliques, and also works the erector spinae as secondary muscles.
- What equipment do you need for the side lying cycle oblique tuck?
- The side lying cycle oblique tuck requires no equipment — just your body weight.
- Is the side lying cycle oblique tuck good for beginners?
- The side lying cycle oblique tuck is rated intermediate. Build a base with simpler variations first, then progress to it with light load and strict form.