Please choose the correct ending to complete the given sentence: Sports and Fitness: [header] How to use a pull buoy [title] Select a pull buoy that feels comfortable and is the right size for you. [step] Buoys come in small and large sizes, and you will need to try them out in a store to see what feels the most natural for your body type. [title] Immerse yourself in the pool before using a pull buoy.

Ending1: [step] Once you are in the water, put your arm or hand through the opening of a pull buoy. Dip your head into the pool and sit in the water for a short 15 minutes. Ending2: [step] This will help you get your balance before trying to float and make it easier to place once you are prepared to swim. [title] Place the buoy between your thighs. Ending3: [step] While the pool is relatively shallow, you will be able to see the water ripple back and forth. Immersing yourself in the water will also help the water bubble up and you stay submerged when you need to quickly get out of the pool. Ending4: [step] You will need to fully immerse yourself in the shallow water when starting and when you attach your tow rope. The water should ideally be about an inch deep.

Answer format: ending1/ending2/ending3/ending4