Like I had mentioned I’m an cyclist racer and have been competing for over 20 yrs .. And as I have gotten older I know we loose power .. I’m 47 and I climb a hill today .. Latigo canyon and I have to say the product I’ve already shaved 2 mins from climbing today last week was way slower .. So does your product work -I have to say Yes !! My breathing is way better and I breath is not labered in any way. I’ve been doing the exersizes everyday and I use it only on my Nordic track . Great product!! I will keep you posted I’m Racing a big race this weekend so this will be the big test for me and how this product really works .. ! Very happy so far !! ,