Bosu Ball Cable Crunch With Side Bends

An advanced core exercise combining cable crunches on a BOSU ball with side bends to develop abdominal and oblique strength.
Instructions
- Connect a standard handle to each arm of a cable machine positioned in the most downward position.
- Place a BOSU ball in front and center of the cable machine with the dome side up.
- Lie back on the BOSU ball with your lower back arched around the curve, your rear end near but not touching the floor.
- Reach back to grasp each cable handle, extending your arms straight out at knee level in front of you.
- Keep your arms straight and aligned with the upward angle of the cable.
- Elevate your torso by crunching forward, maintaining rigid arm position throughout.
- Slowly descend back to the starting position with your back arched and abs elongated.
- Upon reaching fatigue, transition to plank position on the BOSU ball with your back elevated.
- Lower your arms to your sides and perform alternating side bends, reaching toward your heels.
- Repeat for the desired number of repetitions.
Tips
- The BOSU ball provides an unstable surface that increases core demand
- Keep arms straight throughout the crunch portion—all movement comes from your abs
- The side bends at the end provide additional oblique activation
- Use appropriate cable weight to maintain control throughout
- Focus on the crunch motion rather than arm movement
- This is an advanced core isolation exercise
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 | Weight | |
|---|---|---|---|---|
| Male | Female | |||
| Gain strength | 3 | 15 reps | 10 kg | 7.5 kg |
| Build muscle | 3 | 18 reps | 7.5 kg | 7.5 kg |
| Build endurance | 3 | 25 reps | 5 kg | 5 kg |
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