Originally Posted by Carbonfiberboy

Update for me:
All my training is with my wife, because we're a tandem team. We are 134 y.o. We've been polarized since 12/13/14, about when this thread started, though when we started the program we had the flu for 2 weeks. We started with 6 hours/week and are now up to 10-12, including 2 hours of whole body hypertrophy weight workouts. My body weight is down 1-2 lbs. Upper body is more muscular, lower body no change. We're doing all z2, as much as our bodies will absorb, including the 2 hours of weights. This, our 7th week, we had to take a couple days rest: body weight down, MRHRs up, hunger up, poor sleeping, etc. So at our age, it's possible to overcook it while staying in z2. We've tried a little z5 here and there, but nothing like 10%, and we haven't done a real interval series. We're always too tired.
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Comments and suggestions are appreciated.