The Eternal Beach-Body Plan
Phase I - Week 2: Workout V
Exercise X: Bent-Knee Static Oblique
Sets: 2 Reps: Hold for 90 seconds Rest: 45 Seconds
Support yourself on your left elbow and forearm and bend your knees 90 degrees and rest them on the floor. Your body should form a straight line so that your hips are suspended in the air. Hold the position for 90 seconds, and then switch sides and repeat. That's one set.