Clamshell
- Lie to one side, rest your head on your arm, and place the other hand in front of the body for support. Bend both knees and lengthen the spine to pull in the core and the bottom oblique.
- Keeping the pelvis stable, slowly lift and lower the top bent knee.
- Perform three rounds of 30 slow reps.
Image Source: Mark Osmundsen of Movement Culture Collective