Triangle Crunch
The Triangle Crunch mainly works the core. No equipment needed: it uses just your bodyweight.
Optional Equipment
Triangle Crunch Muscles Worked
Primary
Abdominals (rectus abdominis)
Secondary
Obliques; Deep Core (transverse abdominis); Hip Flexor (iliopsoas)
How to do the Triangle Crunch
Setup
Sit on the floor with your torso slightly reclined, supporting your upper body by placing your hands behind or beside your hips on the mat. Extend your legs out in front of you, hovering them slightly off the ground to engage your core.
Movement
From the starting position, draw one knee towards your chest while keeping the other leg fully extended.
In a continuous, fluid motion, cycle your legs by pulling the extended leg in towards your chest while simultaneously extending the opposite leg forward.
The legs should move in a pattern that mimics tracing the sides of a triangle, keeping the motion controlled and rhythmic.
Maintain steady, shallow breathing throughout the movement and ensure your lower back remains stable and aligned.
Form Tips
Keep your core tight and engaged throughout the entire range of motion.
Avoid rounding your shoulders; maintain a proud, open chest position.
Do not rest your heels on the ground between repetitions; keep them hovering to maximize abdominal tension.
Triangle Crunch FAQs
What muscles does the Triangle Crunch work?
The Triangle Crunch mainly works the core. The main muscles are the rectus abdominis.
What equipment do you need for the Triangle Crunch?
None. The Triangle Crunch is a bodyweight exercise, so you can do it anywhere.
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