Shakira's Longtime Trainer Shared the Ab Exercises That Keep Her Shredded

This compound move challenges both your shoulders, chest, back, and core, so it's no wonder it was one of Anna and Shakira's go-tos.

• Lie on your back with your hips and knees both at 90-degree angles, using your low abs to press your lower back into the mat. Holding a dumbbell in each hand, raise your arms toward the ceiling, keeping the elbow joint slightly bent.
• Reach your arms overhead, bringing the dumbbells to tap the dumbbells on the floor above your head (or as low as is comfortable). Don't let your back arch away from the floor as your lower the weights.
• Raise your arms back to the starting position. That's one rep.