Please choose the correct ending to complete the given sentence: Pets and Animals: [header] How to work out biceps with an exercise ball [title] Put your exercise ball in an open area. [step] You should have plenty of free space to move around, and all sharp/heavy objects should be removed so as to minimize the potential for accidents. [title] Get a pair of dumbbells and kneel in front of the exercise ball, holding the weights.

Ending1: [title] Drape your body over the ball with your elbows should be halfway down the ball. [step] Hold the weights up so that your arm is bent and the weights are near your face. Ending2: [title] Place the weight at your center of gravity, keeping your back straight. [title] Cup the bottom of the dumbbells with your hands. Ending3: [step] Raise the weights slowly on your own until you can comfortably lift them (don't worry, you won't be breaking them when doing this). [title] Place your index and middle fingers of each hand on the dumbbells. Ending4: [title] Take a deep breath and hold it. [step] The breath technique is often overlooked among " beginners ", because the oxygen running in the body allows us to breathe more quickly.

Answer format: ending1/ending2/ending3/ending4