I&#x27;m not that overweight (around 77kg for 1.81m). Last week I went for a trial at a gym and tried a treadmill for the first time in my life, I got to 180bpm in around 30secs at 5kph. I don&#x27;t do much exercise besides walking 5 to 10km almost everyday and the rare (and slow) 10mins run. The bpm were measured by the treadmill itself, not sure how accurate that is.