riding the nu step

Riding the Nu step seated stepping machine last week. 2 months ago, I could only step for 2 minutes at a time, but now I can ride independently for a full 20 minutes. Recently, I started moving from power level zero to power level 1 during the session. In addition to strengthening my arms, this machine also helps me try to strengthen my core as I try to remain sitting up while pushing with my arms.