45

I'm now up to 11 minutes on the stairclimber, and at a higher resistance than when I was first able to use it back in December. I have no idea what the unit of measure is, but it varies between zero and 100 with a default of 15. My setting is now 25.

Ascending stairs in general has also become much easier, and I can get up less steep stairs without someone helping. At this rate, I think within 3-4 months I may be able to ascend stairs without putting any weight on a crutch, using it just for balance.