2:15 elliptical

My first bout with the elliptical. After 10 minutes getting used to the machine, I just did a "quick" 60 minutes. I took a brief intermission (bathroom break) then hopped back on for 60 minutes of intervals. Closed it out with a 5 minute warm down in reverse. Throughout the workout, I used the on-board heart rate monitor. My high was 147 and the average was only 121. Who knows ...?