Hello,
Yes , fatigue is a common problem with hormone therapy. I'm 22 months into Zoladex and have at least another 14 months to go. I too was fit and healthy before all this started with no symptoms , so it's annoying to feel like this . But I am accepting that the treatment should produce curative therapy for me and I go along with it.
It's important to keep as active as you can. The more you're able to do then the better you'll feel, it's as important though to recognise when you've done enough and stop. Plan your day and how long you want any activity you undertake to last. Some of it is an attitude of mind and keeping as positive as possible is just as necessary , although that's easier said than done sometimes !
I am in general though now coping well with the HT and as time has passed it has become easier , as it's become part of my way of life.
Once a week I now work as a gardener , play tennis weekly , walk daily and go to a weekly exercise class. Until I retired at the end of last year I found being at work evil for the hot flushes . My desk fan was frequently on whilst flushing and my colleagues would laugh at my predicament but were actually very understanding. My record for flushes at work was 28 over an 11 hour shift ! Being free from the stress of work has really helped me.
Good luck and I hope that life can become easier for you too,,
John