I had about a 17 year break from training, but have been actively training for about 6 years now, but I'm starting to feel burnt out. Debating on taking a break again.
Based on the above 17 and 6, plus the age you first started training, you could be hitting 40ish. I'm sure you know well that the best advice is switch gears, find something else you like and keep moving. I'm in my 70's and at my lowest points in life made up my mind to never go below a certain point physically. This has served me well, for when the high points hit, I was prepared to carry on. Best of luck and stay hooked to MT as it is a great resource as I'm sure you know. (seasoned)