Last night's workout was supposed to be outside but I chickened out and rode indoors because it was dark and 30 degrees when I got home from work. I don't mind riding in the dark but don't trust my judgment for cadence and HR zone. Spent 2 sweaty hours on the rollers and trainer. First 30 minutes was a warmup on the rollers @ 105 rpm then went on the trainer for a Z3 interval @ 95-100 rpm for 1.5 hours. It was a breakthrough workout for me after the ankle fusion. I feel back up to speed and am riding without limitations, concerns or guilt.