You know what else is affecting my sleep? Having a couple of beers in the evening. Having sex. Doing absolutely anything exciting at all, including exercise in the second part of the day.
There's a difference between riding a motorcycle without a helmet and eating red meat.
I'm saying TT is closer to the second, when it comes to losing sleep. It may have some effect, if you dig deep enough, but it's a lifestyle choice that's legitimate to make either way.
Drinking coffee in the evenings and complaining that I can't sleep would be the alternative.
Yeah. Not tempted to give all of it up.