Step by step instructions, muscle activation and variants for the Quarter Sit-Up.
A beginner-friendly abdominal exercise where you curl the upper body only a quarter of the way up from the floor, isolating the rectus abdominis with minimal hip-flexor involvement. The small range of motion keeps constant tension on the abs throughout each rep.
Common mistakes content is coming soon.
The Quarter Sit-Up 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.