<human>: Condense the text into a few key points

I'm not fit or athletic, but I'm a girl of average weight/height ( 5'6", 130 lbs) and can run a mile in about 9:45 (just to give you an idea on where I stand physically).

I started trying out the rowing machines at the gym and lately my time has come up 20 minutes for a 2k. I always use a certain rowing machine, and the one time I tried another I went 500m in just a few minutes (not sure how long, I started rowing then looked down and was surprised at the number). Anyways, I quit that machine and returned to the one I usually used because I figured the other one was messed up.

Is the machine I usually use accurate and I'm just really slow, or is the rowing machine messed up?
<bot>: I'm a girl of average height/weight who just started working out and unsure of whether 2k per 20 minutes is abnormally slow and something must be wrong with the machine