Recommendations: 2-3 Sets, 8-12 Reps
Stand, with your feet flat on the floor. Hold water bottles with your hands about shoulder-width apart and your palms facing up (underhand grip). Bend over with your feet about shoulder width apart. Let the dumbbells hang with your arms straight down. This is the starting position. Curl the bottles up to your chin. Your upper arms should remain stationary throughout the entire motion. Exhale during this movement. Slowly lower the bottles to the starting position. Inhale during this movement. Repeat for the required number of repetitions.