Solartrading SG Hi, Anybody tried this breathing exerciser before? http://singapore.gumtree.sg/c-Stuff-for-Sale-sports-bicycles-fitness-Breathing-Exerciser-W0QQAdIdZ126169826Is it worth investing $42 for it?
Solartrading SG Anyone?i found out that it is called expand a lung. I googled about it and it seem to work as it has good reviews.