The AIRWAAV Performance Mouthpiece boosts endurance by making breathing more efficient during physical activity. By gently biting down on the mouthpiece and guiding the tongue to a specific position below the front intake bar, it activates a reflex that opens the airway wider. This leads to up to a 20% reduction in breathing rate, which significantly reduces the build-up of lactic acid and the feeling of fatigue. As a result, athletes can maintain higher levels of intensity for extended durations, pushing their performance boundaries further without increasing their effort perception.