Please choose the correct ending to complete the given sentence: Sports and Fitness: [header] How to take an ice bath [title] Buy a bag of ice from a grocery or convenience store. [step] Bags of ice are usually kept in freezers at the front or back of the store. Either buy the ice right before you plan to take your bath or store it in the freezer until you are ready.

Ending1: [title] Fill the bathtub halfway up with cold water. [step] The ice will cause the water level to rise when you add it, so you do not want to fill the tub all the way up. Ending2: [title] Add the ice to the ice bath. [step] Step back and float the bag in the water for about 10 seconds before turning to the freezer. Ending3: [title] Soak for 10-15 minutes in the ice water. [step] Soak for as long as you need to keep your toes and ankles warm at the point you will be out for thirty minutes. Ending4: Simply fill the bag and leave it in the freezer until you are ready to use it. The bag should be about the size of your arm.

Answer format: ending1/ending2/ending3/ending4