I think I owe you an update. Five weeks after restarting my training, I am improving slowly but steadily. My running pace at a HR of 132bpm (top of zone 1, where I still do my MAF tests at) went from 6:58 min/km (11:12 min/mile) to 6:13 (10:00 min/mile) and my average power on the bike went at the same HR went from 181 watts to 199 watts (the numbers are the average of about 3 runs and 3 bike rides per week). I now seem to be moving in the right direction at last!
The things I changed about my training were:
– less frequent running, only about 3 runs per week, and I substitute long, steep hikes in Z1 for running when I have the time for it, sometimes running the less steep downhill parts to keep HR up a bit and toughen up the legs
– less frequency on the bike, only about 3 rides per week, but made these rides longer, at least 90min up to 2.5 hours each session
– no double days, either just bike or just run on any specific day
– at least 1 full rest day per week and an additional 2 unscheduled rest days in 5 weeks when I felt sore, tired and sluggish
– a small amount of zone 2 (HR <142bpm) training, about 40-60min in the middle of a Z1 ride on the bike once a week and only about 20min in the middle of a Z1 run once a week
– do my Z1 training even easier, especially on the bike, where I keep my HR about 5-10 beats under the top of Z1 most of the time
– 2 short strength sessions per week, only about 20-30min each, go easy on the leg exercises
I still look at my training as “transition”, but looking back over the last month, I am very happy with the progress I made. I will keep at it and very slowly increase overall volume and especially Z2 volume as tolerated, without it impacting the subsequent training sessions. I plan to do some lactate testing in about another 4-5 weeks from now if my progress continues.