Play time...

hit the gym at lunch...

did 25mins (20mins + 5mins cool down) of "cardio" on the elliptical trainer:

HR stats*:
avg/max: 119/138

*Time spent in HR Zones:
03:36 [Z1: 93-111]
15:15 [Z2: 111-130]
05:44 [Z3: 130-148]
00:00 [Z4: 148-167]
00:00 [Z5: 167-185]

some stretching and then 25mins (20mins + 5mins cool down) of "random" (Level 10) on the recumbent bike:

HR stats*:
avg/max: 103/117

*Time spent in HR Zones:
18:41 [Z1: 93-111]
02:13 [Z2: 111-130]
05:44 [Z3: 130-148]
00:00 [Z4: 148-167]
00:00 [Z5: 167-185]

there's a couple of other cardio options which I might try next time!