I weigh 60kg and do according to the meter in 1500 Steps in 35 minutes, unfortunately, caught the stepper with me today to smoke. It rose more correctly, sichbarer and riechbarer smoke from the hydraulic pumps. On the side is an imprint that you should use it no more than 15 minutes at a time, unfortunately, bring 15 minutes steppes but absolutely nothing. I bought the Stepper years ago, but it never so frequently and extensively used as for 1-2 weeks.
For games and fun quite nice, but if you comply with the 15-20 min default, then it is absolutely unsuitable for the "right" Sport.