You cannot fight something that you cannot see - https://www.freestylelibre.co.uk/libre/ 1. Cheap but good rowing machine. Amazon do one by Viavito for £199 with free postage - https://www.amazon.co.uk/Viavito-Sumi-Folding-Rowing-Machine/dp/B0153NKCZG/ and by JLL for £179 ...