Does the L5/S1 fusion limit you in any way in the gym or everyday activities? I'm guessing no, and you must be very, very active - you got that fusion 35 plus years ago and it sounds like there are no other fused vertebrae.

Good for you for staying active, and doing what is required to make it so. I'm 70 and have lumbar stenosis, scoliosis, listhesis, and degenerative arthritis and degenerative discs. My surgeon tells me my strong core is holding my lumbar spine together and is all that stands between me and fusion. I ran a lot of marathons and along with osteoarthritis, my lumbar spine is shot. Then again, I'm in the gym 7 days/week, do something for the core everyday and spin 5x week. I did have laminotomies at S1/L5/L4 about 10 years ago and don't have pain anymore. I just don't take it for granted.

Staying active is so important - at any age but the sooner the better. Good for you. You are an inspiration. All the best! Joe

(And is it just me, or do you notice how most guys our age, even if they're in the gym a lot, are carrying at least 25-30 lbs (usually more) of unneeded fat in the torso? I was like that and in the past year lost 30 lbs through diet, mostly eliminating all refined sugar, and doing a lot of hard cardio on the indoor bike. Just seems like guys our age think they're immune if all they do is lift weights. Fat is a killer IMO.)