Wow! Who knew? Today I did my 8th Tabata workout on my Linex recumbent bike, but upped the tension from a setting of 8 to 9.
I had no idea it would make it so much harder! My max. heart rate went up to 181 BPM (from a previous high of 176) and my recovery heart rate was 117 (last workout it had dropped down to 110, which is why I increased the tension on the bike this time).
The workout was signicantly harder. Same number of intervals (5) but harder to pedal.