I'm about six year post-menopause. Was on HRT for two years in the "peri" stage of things, when hot flashes and insomnia were at their worst. After I weaned myself off the HRT, I had the occasional hot flash, mainly triggered by stress. Insomnia is still an issue, however.

Now I can't remember the last time I had a hot flash. I don't think they were ever related to cycling or working out. I guess I should count myself among the fortunate.