Step by step instructions, muscle activation and variants for the Ab Coaster Crunch.
An abdominal machine exercise using the Ab Coaster lever, where you kneel on a pad and drive your knees upward in an arc toward your chest. The curved track eliminates hip flexor dominance and keeps tension on the abs throughout the range of motion.
Common mistakes content is coming soon.
The Ab Coaster Crunch is a foundational movement that builds strength and muscle through controlled, progressive overload. Train it 1 to 2 times per week with 3 to 5 working sets per session, gradually adding weight or reps as form holds up.