Warmup: 20 minutes bike, 40 minutes stairclimber, 10 minutes elliptical.
Then tried to do a simulated marathon pace workout on elliptical for just over an hour, roughly equivalent to 9 miles running? Tried to keep HR in the 170-190 range which I think is probably close to where I'm at during a marathon.
Ave/Max HR during tempo: 179/191.
Cooldown: 20 minutes on stairclimber. Ended up 155 minutes of workout, probably just shy of 20 miles running so we'll call it 19.5.
Hope I can endure one more week of total crosstraining, then in December I hope to attempt some easy run miles on 3-4 days of the week, starting with 1-2 miles.