we been doing it for a number of years now and it sucks supposed to measure your respitory endurance but it is biased. a lighter person gets more time than a heavy person females get huge advantage my time I score an 80 ish a females same age lighter but same time gets 114 ish percent. I am assuming you are using the concept 2 rower its what we use and what dps which is where this came from, buy one t is a good work out. only plus is its only less than 10 minutes and done.
i am cancelling my subscription, i am tired of your issues!