This move doesn't look that challenging, but you'll really feel it in your obliques.
- Get into your starting position by standing with your feet hip-width apart, holding a pair of two- to 5-kilogram dumbbells or plates by your sides.
- Begin the movement by bending sideways to your right. Squeeze your obliques as you bend.
- Return to starting position. Then bend to the left side. This completes one rep.
Image Source: Sam Kang