54 here solid body that don't come easy. Every time I think I've done the last set I say in y head " dude your 54, do you really want it? They don't give it away so bust out another set and show you damn well want it".
To you id say dial down calorie and beef up caloric output, you gotta want it bad enuf to wipe the tears and do it! You know what needs to be done.

Hi Mike
I'm 42, and had testicular cancer in 2001 and followed up with radiation and surgery. I've been on HRT for nearly ten years now. Levelup and mk50 have asked good questions and your answers could determine a lot. I'm a qualified sport and exercise nutritionist (BSc. Hons) and would be happy for you to contact me @ [email protected] if you want me to take a look at your diet and lifestyle privately.

The problem could be as basic as overtraining/undertraining or dietary aspects or even lifestyle habits; but as mk50 elluded to...relevant blood work could determine if there are more sinister problems in need of medical attention. The offers there, but either way, if you're concerned get your GP or Primary Care Physician to investigate.

Good luck.

what does your diet look like? and whats your workout like?

Have you been to the doctor and had blood work checked (thyriod, test levels etc..)?