The slow bicycle crunch is a bodyweight abdominal exercise performed lying on the floor, alternating knee to opposite elbow at a deliberate tempo to train theabsand obliques. The standard bicycle is raced, and speed lets the arms and the swinging legs carry it; here tempo is the variable, so each rep takes about four seconds and the far leg stays long and low the whole time. That extended leg is what keeps tension between reps. Coaches use it as a core finisher or a warm-up.
What Muscles Does the Slow Bicycle Crunch Work?
- Primary: Rectus abdominis, external and internal obliques
- Secondary: Iliopsoas and rectus femoris (hip flexors)
- Tertiary: Transversus abdominis, serratus anterior, neck flexors
How Do You Set Up for the Slow Bicycle Crunch?
Lie on your back on a mat with your fingertips behind your ears and the elbows pointed out to the sides. Press your lower back toward the floor, lift both feet and bend the knees to 90 degrees so the shins are level. Raise the shoulder blades an inch off the mat and tuck the chin slightly. Hold that hover until the abs are already working.
How Do You Perform the Slow Bicycle Crunch?
- Hold the hover with both knees at 90 degrees and the shoulder blades off the mat.
- Curl and turn toward your left knee over two seconds while that knee draws in and the right leg extends long.
- Stop when the right elbow faces the left knee and the extended left heel hovers just above the floor.
- Hold the crossed position for one count, breathing out with the ribs pulled toward the far hip.
- Unwind over two seconds, returning both knees to 90 degrees and the chest square.
- Pass through the centre hover, then repeat toward the other knee.
What Are the Key Form Cues?
- Turn the ribcage, not the elbow: drive the armpit across so the trunk rotates instead of the arm swinging in.
- Reach the long leg away: push the extended heel out and low, which is what keeps the abs loaded between sides.
- Count the tempo out loud so both the curl and the return take two seconds.
- Keep the elbows pointing at the walls so the hands never pull the head forward.
- Press the lower back down through the whole rep, especially as the leg extends.
What Are the Most Common Mistakes?
- Pedalling for speed: momentum from the legs replaces trunk work, so hold a four-second rep and stop if the count slips.
- Pulling on the neck: the hands yank the head into the turn and the cervical spine takes the load, so keep the fingers light behind the ears.
- Letting the lower back arch as the leg extends: the lumbar spine takes the weight of the long leg, so raise the extending heel higher until the back stays flat.
- Dropping the shoulders to the mat between sides: tension resets each rep, so keep the blades hovering.
- Moving only the arm across: the elbow travels but the shoulder blade stays down, which removes the oblique work.
What Are the Best Slow Bicycle Crunch Variations?
- Bent knee slow bicycle: the far leg stays bent instead of long, shortening the lever for beginners.
- Bicycle crunch with a heel tap: tap the extended heel down each rep to rest the hip flexors.
- Bicycle crunch hold: pause five counts in the crossed position on each side.
- Single side bicycle crunch: work all reps toward one knee before switching, loading one oblique.
- Knee to elbow crunch: the same cross-body crunch with both feet starting on the floor.
How Do You Progress the Slow Bicycle Crunch?
- Extend the far leg lower and straighter, the only load increase bodyweight offers here.
- Build from 8 reps per side up to 15 with the tempo intact.
- Add a set per week from 2 up to 4 once the last set holds the count.
- Slow the rep to six seconds, or pause three counts in the crossed position.
How Should You Program the Slow Bicycle Crunch?
Place the slow bicycle crunch at the end of a session, after lifting, or early as a warm-up when the tempo is easy. It handles daily work, but two to three times a week is enough. Perform 2 to 4 sets of 8 to 15 reps per side with 30 to 45 seconds of rest. Pair it with a plank so the trunk trains rotation and bracing together.