Bicycle kicks target your core, hip flexors, and lower abdominal muscles

Bicycle kicks are a bodyweight exercise where you lie on your back, lift your shoulders slightly off the ground, and pedal your legs in a cycling motion while bringing each elbow toward the opposite knee. The movement works your rectus abdominis (the front abdominal muscle), your obliques (the side abdominal muscles), and your hip flexors (the muscles at the top of your thighs that lift your legs). Because you're moving your legs and torso at the same time, your core has to stabilize your entire body, which is why the exercise feels harder than it looks.

The pedaling motion also engages your iliopsoas and rectus femoris — muscles that run from your hip to your knee and help lift your thigh. Your lower back muscles work too, though they're mainly stabilizing rather than doing the main work. The faster and more controlled you move, the more your muscles have to work to keep your body in the right position.

Key Takeaways

  • Bicycle kicks work your front and side abdominal muscles, hip flexors, and the muscles on the front of your thighs.
  • The exercise requires your core to stabilize your entire body, so proper form matters more than speed.
  • Beginners should slow down the movement and keep their lower back pressed to the floor to avoid strain.
  • Bicycle kicks are a bodyweight exercise that requires no equipment and can be done at home.

How to perform bicycle kicks with correct form

Start by lying flat on your back on a mat or carpet. Bend your knees and place your feet flat on the floor, hip-width apart. Put your hands behind your head with your fingers lightly touching the back of your skull — not pulling on your neck. Press your lower back into the floor; this is the position you want to maintain throughout the entire movement.

Lift your shoulders a few inches off the ground by engaging your abdominal muscles. Bring your right elbow toward your left knee while straightening your right leg. Then switch: bring your left elbow toward your right knee while straightening your left leg. Move slowly and deliberately. The slower you go, the more control you have and the less likely you are to strain your neck or lower back. Aim for 10 to 15 repetitions on each side, rest, and repeat for 2 to 3 sets.

The most common mistake is pulling on your neck with your hands. Your hands should be there for light support only — your abdominal muscles should be doing the work of lifting your shoulders. If you feel neck pain, stop and reset your hand position.

Why your lower back matters in this exercise

Your lower back is vulnerable during bicycle kicks because your hip flexors naturally want to pull your spine into an arch. When you straighten your legs, especially if you move quickly or let your legs drop too low, your lower back can come off the floor. This creates a gap between your spine and the mat, which puts pressure on the discs in your lower back.

To protect your lower back, keep your lower back pressed flat against the floor throughout the entire movement. If you can't do that, your legs are dropping too low. Bend your knees more, move more slowly, or do fewer repetitions. You should feel the work in your abdominal muscles and hip flexors, not in your lower back. If you have a history of lower back pain, talk to a doctor or physical therapist before adding bicycle kicks to your routine.

Variations for different fitness levels

If standard bicycle kicks are too difficult, try the bent-knee version: keep both knees bent throughout the entire movement instead of straightening your legs. This reduces the load on your hip flexors and lower back while still working your abdominal muscles. Move at the same slow, controlled pace.

For a harder variation, slow down the movement even more and hold each position for a second before switching sides. You can also add a pause at the top of the movement, where your elbow is closest to your opposite knee. Another option is to do the movement with your hands crossed over your chest instead of behind your head — this removes the support your hands provide and forces your core to work harder to keep your shoulders lifted.

If you want to increase the difficulty without changing the movement itself, do more repetitions or more sets. Adding 5 extra reps per side or an extra set will increase the work your muscles do without changing your form.

How bicycle kicks fit into a core workout routine

Bicycle kicks are one tool in a larger core routine. They work your abdominal muscles and hip flexors well, but they don't work your back extensors (the muscles along your spine) or your glutes. A balanced core routine includes exercises that work all these areas: planks or dead bugs for stability, back extensions or Superman holds for your back muscles, and glute bridges for your glutes.

Most people do bicycle kicks 2 to 3 times per week as part of a broader workout. You don't need to do them every day — your muscles need rest days to recover and get stronger. If you're new to exercise, start with 1 to 2 sessions per week and add more as your fitness improves.

When to stop and see a professional

Bicycle kicks should feel like a challenge in your abdominal muscles and hip flexors, not pain in your neck or lower back. If you feel sharp pain, pinching, or numbness in your lower back or legs, stop the exercise and rest. If the pain continues after a few days, see a doctor or physical therapist. They can check whether you have an underlying issue that makes this exercise unsafe for you right now.

Neck pain during bicycle kicks usually means you're pulling too hard with your hands or lifting your shoulders too high. Reset your hand position, lower your shoulders slightly, and try again. If neck pain persists, skip this exercise and choose a different core movement instead.

Frequently Asked Questions

How many bicycle kicks should I do per workout?

Start with 10 to 15 repetitions on each side for 2 to 3 sets. As you get stronger, you can add more reps or sets. Listen to your body — if your form breaks down, stop and rest rather than pushing through.

Can I do bicycle kicks every day?

You can, but it's not necessary. Your abdominal muscles recover faster than larger muscle groups, so daily core work is safe for most people. However, 2 to 3 times per week is enough to see results, and mixing in other core exercises prevents boredom and works more muscles.

Do bicycle kicks burn belly fat?

Bicycle kicks build abdominal muscle strength and endurance, but they don't specifically burn fat from your belly. Fat loss comes from overall calorie balance — eating less than you burn — combined with regular movement. Bicycle kicks contribute to that overall activity, but they're not a fat-burning exercise on their own.

Why do my hip flexors feel sore after bicycle kicks?

Your hip flexors are doing a lot of work during this exercise, especially when you straighten your legs. Soreness is normal if you're new to the movement or did more reps than usual. Rest for a day or two and do a lighter version next time. If soreness lasts more than a few days or is sharp rather than a dull ache, see a doctor.