Powerlung Sport Breathing Trainer for Cardio Endurance (Blue)

This product was purchased at the recommendation from a doctor for my son who is training this summer and he has herniated a disk in his back and cannot train at full capacity. This breathing apparatus allows him to keep himself fit without being able to run and/or excerise with his cardio.

Great product, works as advertised!!! I bought this product to see if it would help improve my breathing due to mild asthma. I was somewhat skeptical at first, but thought I give it a try, and I'm glad I did. I started seeing results within first week (twice a day, 3 sets of 10 according to the manual). It's also helped me w/ my swimming performance. Thanks to PowerLung, I'm breathing much better now!!!

I am an enthusiastic jogger and I like aerobic training, and since I bough the Power Lung Sport I have notice and increase in my resistance while taking my daily run.

Maybe is just an improved breathing control or improving breathing capacity, but I just feel that I can actually train longer than ever.