Oblique Crunches

A targeted oblique exercise where you crunch diagonally, bringing your elbow toward your opposite knee to develop the side abdominal muscles.
Instructions
- Lie flat on the floor with your lower back pressed to the ground for stability.
- Bend your knees and position your feet flat on the floor, hip-width apart.
- Place one hand beside your head and the other to the side against the floor for balance.
- Keep your feet elevated and resting on a flat surface.
- Now lift the shoulder on the same side as your elevated hand.
- Elevate your body upward until your elbow touches your knee on the opposite side.
- For example, if your right hand is beside your head, elevate until your right elbow touches your left knee.
- Lower your body back to the starting position with control.
- Complete all reps on one side before switching sides.
Tips
- Breathe in during the lowering phase and out during the upward crunch.
- The movement should be smooth and controlled, not jerky.
- Keep your lower back in contact with the floor to prevent strain.
- Perform the same number of repetitions on both sides for balanced development.
- The diagonal crunch motion is what activates the obliques effectively.
- Avoid pulling on your head with your hands; let your core do the work.
- Start with bodyweight and add resistance when ready for progression.
Recommended starting values
Sensible novice starting points for each goal, for a lifter aged 25–40. Scale down for smaller frames or older lifters. Treat the first set of any session as a discovery set.
| Goal | Sets | Reps |
|---|---|---|
| Gain strength | 3 | 15 reps |
| Build muscle | 3 | 18 reps |
| Build endurance | 3 | 25 reps |
Alternatives
Exercises that target the same muscles with the same force and mechanic.
Cable Twist (High to Low)
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Cable Twist (Low to High)
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Hanging Oblique Knee Raise
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Hanging Windshield Wiper
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Oblique Crunch
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Side Bend
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Side Bend (Cable)
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Torso Rotation (Machine)
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