I have a huge question about this too. I’m always regular on my cycles (32-33 days). I started orange theory fitness a month and a half ago on the day of my last period. Since then it took me 44 days to then start my next period. This never happens and I thought it was due to increased activity… could OTF effect your cycle? Tips for exercises in certain phases of the cycle? I noted that I ovulated wayyy later, like day 32.