I ended up tweaking my back during set six of the day I was planning on 9 sets of four a week ago Friday. This is Phase 2, Slow and Steady. I feel pretty much better by now; I took a week off, and I might take another one. I've been gently stretching and walking a lot.
It's certainly not the program's fault. I've been lifting in the morning for a year or two, and the whole time, I've been trying to avoid hurting my back. I just think that I don't presently tolerate this type of exercise early in the morning. It takes me back to the passage in at least one of Pavel's books about the hydration of the discs of the back in the first hour of the morning after rising.
This has motivated me to move my kettlebell training to the afternoon or evening, depending on whether it's a work day. I just liked mornings, as it was easier to keep to a regular schedule; I often train martial arts after work.
Anyway, I was thinking about how to proceed. Right now, I see two options that I would like to choose between. I could resume KB Strong!, but back up maybe a week or two in the program, or I could return to The Giant. I did the latter during the winter and early spring. I liked it, but I could feel the wear and tear during 1.2, after completing 1.0 and 1.1 prior.
One thing I like about The Giant is that I could shorten my feedback loops: I could repeat 3.0 until I'm strong enough to embark on the 1-series (with maybe 2.0 before 1.1) journey. The autoregulation in The Giant also feels more accommodating to bad days or feeling tired after work, or whatever.
On the other hand, my KB Strong! sessions tend to be a little shorter than my sessions were in The Giant (I mainly stuck to 30 minutes, but would often shorten to 20 minutes, once things started to get consistently difficult). KB Strong! will also tolerate backing off from thrice weekly to twice weekly, if conditions demand.
Thanks for reading this far. All that said, I mainly mean to ask: Do any other nuances or approaches occur to any of you? What do you do when you have to take a break in the middle of a KB Strong! cycle?