Good question. The only slightly relevant info I have is that apparently doubling a workout makes no difference. The study is obviously flawed by virtue of a sample size of 2, lol. But it’s interesting to think about.

For myself, I do whatever programming my crossfit gym has, 5 days a week. We usually cycle various lifts every month or so, and I definitely have been noticing good improvement at this pace.

I think it really depends on what my volume is. I bench 3x a week, and I’m totally fine, but I don’t go so hard that I can’t recover in a day. There’s definitely a point where doing more is counterproductive when you can’t recover by the time you need to train again.