Band bicycle crunch

Target muscle: Iliopsoas, Obliques
Synergist muscles: Adductor Brevis, Pectineous, Rectus Abdominis, Sartorius
Equipment: Band
Body part: Waist
Type: Strength

The band bicycle crunch is a banded core exercise that primarily works the iliopsoas (deep hip flexors) and the obliques, with the rectus abdominis and hip-flexor synergists (adductor brevis, pectineus, and sartorius) assisting on every rep. Looping a band around your feet adds resistance to the cycling leg drive, so each knee tuck and torso rotation works harder than the bodyweight version.

How to do the Band bicycle crunch

1Loop a resistance band around the arches of both feet and lie flat on your back on a mat.
2Place your hands lightly behind your head, lift your shoulder blades off the floor, and raise both legs so your knees are bent over your hips.
3Brace your core and pull one knee in toward your chest while extending the opposite leg out against the band's tension.
4Rotate your torso to bring the elbow of the extended-leg side toward the knee that is tucked in.
5Pause briefly at the point of peak rotation, keeping your lower back pressed into the floor.
6Switch sides under control — extend the tucked leg and pull the other knee in while rotating your torso the opposite way.
7Continue alternating in a smooth pedaling motion for your target reps, then lower both feet to finish.

Form tips

Drive the rotation from your obliques by turning your shoulder toward the knee, not by yanking on your head with your hands.
Keep your lower back flat against the floor throughout to keep tension on the abs and protect your spine.
Move at a controlled tempo so the band resists both the knee tuck and the leg extension — speed reduces the work.
Exhale as you crunch and rotate, inhale as you switch sides, to help maintain a tight brace.

Common mistakes

Pulling on your neck with your hands, which strains the cervical spine instead of working the abs.
Letting the lower back arch off the floor as the leg extends, which removes tension from the core and stresses the spine.
Rushing the pedaling motion so momentum does the work, cutting the obliques and hip flexors out of the rotation.
Bringing the elbow to the same-side knee instead of the opposite knee, which skips the rotational work the obliques provide.

Frequently asked questions

What muscles does the band bicycle crunch work?

It primarily targets the iliopsoas (deep hip flexors) and the obliques, with the rectus abdominis, adductor brevis, pectineus, and sartorius assisting as synergists during the leg drive and torso rotation.

Why bring the elbow toward the opposite knee?

Crossing the body — elbow toward the opposite knee — forces your obliques to rotate the torso, which is where most of the core work comes from. Reaching the same-side knee skips that rotation.

Is the band bicycle crunch good for beginners?

Yes. Start with a light band and a slow tempo, keeping your lower back flat. If it strains your neck, do fewer reps and focus on rotating from the obliques rather than pulling on your head.

How many sets and reps should I do?

Aim for 2–3 sets of 10–20 reps per side, controlled. Stop the set when your form breaks down or your lower back starts lifting off the floor.