Back

Bicycle Crunch

The Bicycle Crunch is a controlled core exercise that builds strength and coordination by combining rotation with alternating leg movement.

Bodyweight exercises

Fatigue level

Low 2/3 High

Add to Workout

Bicycle Crunch

Build

Published: Apr 22, 2025 · Updated: Mar 15, 2026

The Bicycle Crunch uses a slow, alternating pedaling pattern to train the rectus abdominis and obliques through rotation and controlled extension. Each rep requires the torso to rotate while one leg extends, creating a coordination demand that straight crunches lack. Proper breathing mechanics during core exercises, including controlled exhalation during the effort phase, help maintain intra-abdominal pressure and support spinal stability (Hackett & Chow, 2013).

Keep your lower back lightly pressed into the floor and move with control rather than speed. The rotation should come from your torso, not from pulling with your arms behind the head. Resistance training that targets the midsection contributes to reductions in visceral fat when combined with a well-structured program (Wewege et al., 2022).

Bicycle crunches fit well into core-focused sessions, warm-ups, or finisher circuits where movement quality matters more than rep count. Keeping the feet higher off the floor and reducing rotation range makes the exercise easier, while slowing the tempo and fully extending each leg on every rep increases the challenge considerably.

Content follows our evidence-based methodology

Report an issue

Thank you for your feedback!

Technique and form

How to perform the Bicycle Crunch

Lie flat on your back with your hands placed lightly behind your head and elbows flared out to the sides.
Lift your shoulders and upper back off the floor while engaging your core and drawing your navel toward your spine.
Bring your right knee toward your chest while simultaneously extending your left leg straight out a few inches above the floor.
Rotate your torso to bring your left elbow toward your right knee, keeping your elbows wide and neck relaxed.
Exhale as you rotate and crunch, focusing on the contraction in your obliques rather than pulling on your neck.
Switch sides by extending your right leg while bringing your left knee toward your chest, rotating to touch your right elbow to your left knee.
Maintain a stable lower back by pressing it into the floor throughout the movement, avoiding any arching.
Continue alternating sides in a fluid, controlled cycling motion, breathing rhythmically with each rotation.

Important information

Keep your elbows wide throughout the exercise to avoid neck strain; the movement should come from your core, not from pulling your head forward.
Make sure your lower back remains in contact with the floor at all times to protect your spine and properly engage your abdominals.
Focus on the quality of the movement rather than speed; a slow, controlled bicycle crunch is more effective than rapid, jerky rotations.
If you feel any neck discomfort, try placing your fingertips at your temples instead of behind your head.

Common Mistakes: Bicycle Crunch

Forgetting to breathe

Exhale during the contraction and inhale as you lower. Steady breathing helps you maintain core engagement.

Using momentum to swing

Slow, controlled movements engage your core much more effectively than fast, swinging reps.

Swinging your body for momentum

Keep everything still except the joint you're working. If you need to swing, the weight is too heavy.

Not using full range of motion

Go through the complete movement from start to finish. Partial reps give partial results.

Rushing through reps

Slow, controlled reps work the muscle much better than fast, sloppy ones. Take your time on both the lifting and lowering phase.

Benefits of the Bicycle Crunch

Works multiple muscles at once

The Bicycle Crunch targets your abdominal muscles and side core muscles (obliques), making it an efficient exercise that trains several important muscle groups in one movement.

Focused muscle targeting

As an isolation exercise, the Bicycle Crunch lets you zero in on your abdominal muscles without other muscles taking over. This is great for bringing up a weak point or adding definition.

Strengthens your core foundation

A stronger core improves your posture, protects your lower back, and makes you more stable during every other exercise you do.

Equipment advantage

Using your own bodyweight makes this exercise accessible anywhere without equipment, giving you a training benefit that's hard to replicate with other setups.

Train anywhere

The Bicycle Crunch can be done at home with minimal or no equipment, making it easy to stay consistent even when you can't get to the gym.

Muscles Worked: Bicycle Crunch

The Bicycle Crunch is an isolation exercise that focuses your effort on the abdominal muscles. Here's a breakdown of every muscle involved.

Primary muscles

Abs — Your abdominal muscles brace your core and keep your spine safe. These are the main muscles doing the heavy lifting during the Bicycle Crunch.

Obliques — Your side core muscles (obliques) resist rotation and keep your torso steady. This is the main muscles doing the heavy lifting during the Bicycle Crunch.

The Bicycle Crunch primarily works 2 muscles with 0 supporting muscle assisting the movement.

Risk Areas

Abs

Muscles worked during the Bicycle Crunch

FAQ - Bicycle Crunch

What muscles does the Bicycle Crunch target?

The Bicycle Crunch primarily engages your rectus abdominis (six-pack muscles) and obliques (side abs). It also activates your hip flexors and to a lesser degree, your lower back muscles, making it one of the most effective exercises for comprehensive core development.

How do I perform the Bicycle Crunch with proper form?

Lie on your back with knees bent, hands behind your head, and elbows wide. Lift your shoulders off the ground, bring one knee toward your chest while rotating to touch it with the opposite elbow, then switch sides in a fluid pedaling motion. Keep your lower back pressed against the floor throughout the movement to protect your spine.

How can I modify the Bicycle Crunch based on my fitness level?

Beginners can slow the movement down and reduce the range of motion, keeping feet higher off the ground. To increase difficulty, extend the straight leg closer to the floor without touching it, slow down the tempo to increase time under tension, or add resistance by holding a weight plate across your chest.

What are common mistakes to avoid with Bicycle Crunches?

Avoid pulling on your neck with your hands—instead, support your head lightly while using core strength for the movement. Don't rush through repetitions; controlled movement ensures proper muscle engagement. Finally, never allow your lower back to arch off the floor, as this can lead to strain and potential injury.

How often should I include Bicycle Crunches in my workout routine?

Incorporate Bicycle Crunches into your routine 2-3 times per week as part of a comprehensive core workout. Start with 2-3 sets of 12-20 repetitions per side, and allow at least 24-48 hours between sessions for your core muscles to recover properly.

Scientific References

The Valsalva maneuver: its effect on intra-abdominal pressure and safety issues during resistance exercise

Hackett DA, Chow CM · J Strength Cond Res (2013)

The Effect of Resistance Training in Healthy Adults on Body Fat Percentage, Fat Mass and Visceral Fat: A Systematic Review and Meta-Analysis

Wewege MA, Desai I, Honey C, et al. · Sports Med (2022)

Does aerobic and strength exercise sequence in the same session affect the oxygen uptake during and postexercise?

Vilacxa Alves J, Saavedra F, Simão R, et al. · J Strength Cond Res (2012)

Sources are peer-reviewed academic publications from PubMed.

Add to Workout

Bicycle Crunch

Build your custom workout Let's build

Report an issue

Thank you for your feedback!

Built for progress

Take the guesswork out of training

Create personalized AI-powered workout plans that evolve with you. Train smarter, track every rep and keep moving forward, one workout at a time.

Pre-register now

Find out more

Be among the first to join!

Workouts with Bicycle Crunch

Best Full Body workouts

The full body includes all major muscle groups, such as the chest, back, shoulders, arms, core, and legs. In these workouts, the areas are trained together in each session to maximize efficiency and overall fitness. Core compound movements like squats, deadlifts, bench presses, and rows create a strong foundation by working multiple muscles at once, helping you build strength, improve balance, and burn more calories. These exercises are complemented by targeted isolation work to address specific muscles and support balanced development throughout your entire body.

Best Ab workouts

Ab workouts help strengthen the muscles at the center of your body: your rectus abdominis, obliques, and deep core. This plan combines bodyweight classics like crunches and leg raises with dynamic and weighted variations to challenge your abs from multiple angles. These workouts don’t just sculpt a six-pack: they improve posture, stabilize your spine, and support better performance in nearly every movement. Whether you're a beginner or more advanced, smart ab training supports both aesthetics and functional strength.