Hyperoxic Training Doubles Exercise Performance Gains
Can Training with Extra Oxygen Make Athletes Faster?
Yes. This study found that athletes who trained while breathing 60% oxygen improved their endurance by 117%, compared to only 50% improvement when training with normal air. The extra oxygen allowed them to train at 8.1% higher power outputs while maintaining the same heart rate.
Researchers wanted to test a simple idea. If athletes can work harder while breathing extra oxygen, could training at those higher intensities produce better results? This study put that theory to the test with a clever crossover design.

