Sometimes I guess I just gotta stick my finger in the boiling water to see if it's hot.......
JT's advice was to avoid hammering for a bit with the "back pain" I picked up last Saturday. However, it got a lot better in a couple days. I was even able to play golf Monday and Tuesday. I did the Time Trial Wednesday night and while it was a little stiff I managed. Today we did the ride below and I was probably the lead anchor in a group of 8. I had to really work to stay with the group. About 20 miles into the ride I could feel the "twinge" in the lower back again.
However too far into the ride to make any adjustments so I just "hammered away"-including a time trial up the first 6 mile climb, and then pushing through two 17% stretches on the second climb.
I was amazed at how much time I spent in my upper HR zones. Max heart rate was 190+......I'm pretty trashed tonight!! Not to mention the stiff lower back!
Edit: One of the guys that rode with us is 65 or 66 and is an incredibly strong rider. He did the 10 mile TT Wednesday night 2 minutes faster than me and averaged 27 mph versus my 25 mph. I was working pretty good to get up the hills on the route above using my 50/34-12/27. He was running a 53/39 with a 12/25 cassette. He struggled a little on the 17% section but breezed right along on everything else. Just incredible in my book.