The Side Jackknife is an oblique-focused ab movement that helps shape and strengthen the side of your core. It’s a go-to for FitnessTracker users working on core symmetry, trunk control, or simply adding variety to their ab training routines.
Instructions
- Lie on your right side with your legs extended and your left hand behind your head.
- Brace your core and lift both your torso and legs toward each other, forming a jackknife shape.
- Pause briefly at the top, squeezing your obliques.
- Lower back down with control.
- Repeat for your desired reps, then switch sides.