Bicycle Crunch Exercise

The bicycle crunch exercise is one of the most effective bodyweight movements for targeting your entire core—especially the obliques and lower abdominals. Rather than just flexing your spine like a standard crunch, the rotational movement mimics functional daily motion, helping stabilize your pelvis, support posture, and protect your lower back in midlife.

Because this movement requires coordination and rotational control, form matters far more than speed. Pulling on your head or rushing through reps often strains the neck instead of engaging the abdominal wall.

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Muscles Targeted

  • Primary: Rectus Abdominis (six-pack muscles), Obliques (internal and external rotational core muscles)
  • Secondary: Transverse Abdominis (deep core stabilizer), Hip Flexors, Neck Flexors (stabilization)

Equipment Needed

  • Exercise mat (bodyweight only)

Step-by-Step Setup & Form

  1. Starting Position: Lie flat on your back on a supportive mat. Bend your knees and place your feet flat on the floor.
  2. Hand Placement: Lightly support the base of your head with your fingertips. Keep your elbows wide rather than pulling them inward toward your face.
  3. The Movement: Using your abdominal muscles, lift your head, neck, and shoulder blades slightly off the floor.
  4. The Rotation: Simultaneously draw your right knee toward your chest while rotating your torso so your left armpit/elbow moves toward that knee.
  5. No Need to Force Contact: You do not need your elbow to actually touch your knee—focus on the torso rotation rather than compressing your neck.
  6. Pause & Switch: Pause for a brief second at the peak of the movement, return with control, and repeat on the opposite side.

Form Tips & Common Mistakes to Avoid

  • Avoid Neck Yanking: If your neck feels sore, ensure you are resting the weight of your head into your fingertips like a hammock rather than pulling your chin into your chest. Your neck flexor muscles are working to support your head against gravity and will naturally get stronger over time.
  • Maintain Lower Back Contact: Keep your lower back gently pressed toward the floor to prevent arching or lumbar strain.
  • Slow the Tempo: Moving slowly with a 1–2 second pause at each rotation recruits deep muscle fibers much more effectively than kicking quickly.