So you know you are in perimenopause or in menopause? Have you had a physical checkup recently? Getting enough sleep?

Have heard that it is advised not to engage in really rigorous exercise 1 hr. before going to bed.

Yes, agree that you will have to modify your eating habits. What have you tried to change in last few months re eating habits? Or what do you think you need to change but just haven't gotten around to it? If one doesn't know, then food diary might help to detect patterns.

I did have high metabolism even before I restarted cycling regularily. First 10 yrs. of regular cycling, weight used to come off more easily by each summer. But now (which happened approx. after 44), to achieve the same thing, I had to shift diet by reducing white rice, bread and heavy pasta intake.

Meanwhile my cycling this year has increased at least by 35+%.