Overexertion can give you a feeling of running out of air or being short of breath. In this state, you may not be able to swim to safety or make sound decisions on how to do so. Having your buddy close by gives the option of buddy tows and support so that you can make decisions together. If you are over exerted, first STOP, THINK, BREATHE, and ACT. If you feel you cannot catch your breath, try forcefully breathing OUT first and then take a slow, deep breath in. Get your composure, and work with your buddy to get to safety.