Athletes use airbreath® oxygen to boost their performance. They use it before, during and after training sessions or competitions. It increases their blood oxygen percentage up to almost 100% capacity, which enables more exertion before they need to take a break. airbreath® oxygen is suitable for both professional and recreational athletes. In aerobic sports (e.g. running, cycling, swimming) airbreath® oxygen will mostly improve endurance, whereas in anaerobic sports (e.g. tennis, weight lifting, soccer) it will boost power..