Jackknife Sit-ups / Crunch / Toe Touches
- Lie flat on an exercise mat, extending your arms straight back behind your head.
- Fully extend your legs also. This is the start position.
- Bend at your waist and at the same time, raise your legs and arms to meet in a closed jackknife position. Exhale as you do this.
- At this point, your legs should remain fully extended at between 35-45 degrees from the floor.
- Your arms should be fully extended, parallel to your legs.
- Your upper body should be raised off the floor.
- Return to the start position by lowering your arms and legs back to the floor, exhaling as you do so.
- Repeat.
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Related exercises to discover
Jackknife sit-ups / crunch / toe touches is a at-home exercise that targets abs and also works glutes & hip flexors. Use the illustration and instructions above to learn how to perform this exercise with proper form. Related exercises that work similar muscle groups include Battle rope snakes, stability / swiss / exercise ball reverse crunches and seated ab contractions. Browse our free illustrated exercise directory for more exercises.
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Follow ready-made home and gym plans with visual demos and timers – or create custom workouts from exercises like this.
Build illustrated workout plans for your clients in minutes – then share them as branded PDFs or interactive workouts.
Our illustrated Yoga Cards deck is the perfect way to start practicing at home – no class, no studio, no experience needed. 100,000+ sold.
