Yeah, that's sort of the conclusion I've come to in the last ~6 years. There are so many likely-true benefits to exercise that it almost doesn't matter if a few of them turn out to be false, since no matter what you will probably still benefit from the net result.
The "neurobiological effects of physical exercise" page on Wikipedia gets submitted on HN frequently with few votes, but man is it a fascinating read. Beyond the well-known runner's high, you get cognitive improvements in both short and long term. It even slows down Alzheimer's after you get it, allegedly.
Exercise is no panacea, but people really don't realize how many things it (allegedly) can do, even with super short durations you see in these interval training regimens. Don't force it on people with ME/CFS, sure, but most of us really can and should set aside an hour a week (or less, if you do SIT instead of HIIT).
Well look, the sales pitch for SIT is that you get most of the HIIT goodness at three minutes per day of exercise. Now to hit the required intensity… how much is an indoor bike anyways?
