Your post shows some appalling ignorance regarding bones and their deterioration. I APOLOGIZE in advance because I know what I am expressing is harsh - but I read it as very smug.

Let me help educate you: Your bones are not "one thing." Each of your bones are different in density. The measurements available to us are ONLY A GUESS and a generalization of where we are at. I will offer you my scenario:
I see the worlds BEST orthopedic spine surgeon at UCSD. I have been monitored with Dexa scans for over 30 years at different medical facilities. I had my hips replaced in 2012, 2014, and a major lumbar surgery in 2018. Despite WONDERFUL Dexa scores and a move to a PREMIUM diagnostic machine with TBS scoring, I was told I was out of osteopenia in 2023 before my switch to the TBS machines.
Fast forward to cervical spine surgery: My C-5 fell APART in their hands! crumbled it was so paper thin. After TWO surgeries -- because the screws were not stable because the surrounding bones were not strong enough to HOLD the hardware, I was immediately whisked off to the bone medicines, where I GRATEFULLY stay, even with the side effects.

It is a 5 year protocol with 2 years of daily Tymlos and 3 annual infusions of Reclast. A total of 5 years of my life in exchange for STRONGER, DENSER bones. I'll be done at 72, and it will be good for 10 years.
Your T scores are terrible, and you should be on bone meds. My scores were like yours.

I have had several amazing conversations with top drawer orthopedic surgeons and they don't KNOW until they open you up what, in reality, they will find. I have always eaten perfectly, I have trained for nutritional chemistry, taken health and biological sciences and not of it helped me when I got to this state of being.

I hope you've had your calcium levels taken to be sure you are not hardening your arteries. 3 times I've been told to take calcium and 3 times the doctor calls me and says NO CALCIUM. I ended up with dad's coronary heart disease and calcium causes plaque/hardening of the arteries with CAD.

I am on BHRT and very happy to have restarted that after a 10 year hiatus. How do you think you can build bones without hormones, I do not know. You can't. End of story. Not anything meaningful.
People are selling you hype and you bought it. This site is for knowledge and fact based science. Not "I WISH" something to be true. But it is not. There are real places to go for the science online. NIH is one.
Building bones is an anabolic process. Do you know what that means? It means you can't reach the bones directly to build them.
I do agree that the resistance and weight-bearing exercises are best. I walk every day twice a day because it has long been proven that smashing your legs into the concrete beneath one's feet is terrific for bone building. Girl, you'd better wake up and smell the bone meds before it is TOO LATE and you can't do a thing about it!
The way you phrased your question is silly. NO ONE can substantiate that getting into your 70s and the things you listed are enough. Especially with your T scores! Holy cow.
Side effects are okay for me. Why? because my body is building bone. There is no guessing about it! We do the numbers. In two more months I will go back for my next DEXA. I hope and PLAN for good results - because its the only thing out there to guarantee I am maintaining what I got.
I went into menopause early. 47. Your bones deteriorate faster. Why? because you don't have hormones.
Strontium is a whole other subject. People like me would be out because of the CAD.
I wish you a fracture free life. I had fractures when they went in to do the hip implants. Or, they fractured my bones then. They don't seem to know. You wouldn't know if you did. Some people know by the spinal back pain they start getting.
I think all that stuff you are doing is great. But it will be too late if you wait to change your mind.

here's what your numbers say about RIGHT NOW:
You said: does strontium increase bone densityYes, strontium increases bone density, but the way it works is complex. It incorporates directly into your bone tissue and stimulates new bone formation while slowing down bone breakdown.However, because strontium is heavier than calcium, it artificially inflates your bone mineral density (BMD) scores on standard DEXA scans. This means your bone density reading may appear higher than your actual bone strength.If you are considering strontium for bone health, keep these distinctions in mind:Pharmaceutical Strontium (Strontium Ranelate): This prescription medication has been clinically proven to reduce the risk of fractures. It is typically used in Europe and other countries, but it is not commonly prescribed in the US due to cardiovascular safety concerns.Over-the-Counter Strontium (Strontium Citrate): Widely available in the US as a nutritional supplement, it lacks the large-scale, long-term clinical trials supporting fracture prevention seen with the prescription form.Scan Adjustments: If you take strontium, it is critical to inform your doctor, as bone density scanners can misinterpret strontium's density.Consult with your primary care provider or a bone health specialist to determine the safest and most effective treatment plan for your specific needs. To learn more about treatment guidelines for osteoporosis, you can visit the National Institutes of Health (NIH) Osteoporosis and Related Bone Diseases National Resource Center.This is for informational purposes only. For medical advice or diagnosis, consult a professional. AI responses may include mistakes. Learn more12 sitesSTRONTIUM: NOT ALL IT'S CRACKED UP TO BEDiscussion: Strontium ranelate is commonly sold as an over the counter supplement in the United States for bone health and has bee...SHM AbstractsChange in Bone Mineral Density with Strontium CitrateStandard doses of SrR (2g) and SrC (1944mg) deliver 680mg of elemental Sr, twice the amount naturally present in the human body on...Symbiosis Online PublishingCardiovascular safety of calcium, magnesium and strontium - PMCBone effects Strontium lactate and strontium chloride have both been studied as potential treatments for osteoporosis in human and...PubMed Central (PMC) (.gov)Show allYou said: -3.7 lumbar; -2.0 femur t scroesBased on your T-scores, you have severe osteoporosis in your lumbar spine (-3.7) and osteopenia (low bone mass) in your femur neck (-2.0).Because your lumbar spine T-score is \(-2.5\) or lower, it falls clearly into the category of osteoporosis. A score of \(-3.7\) indicates a significantly elevated risk for spinal compression fractures, making proactive medical management crucial.

Accidents happen. Better get your head out of the clouds and over to the endocrinologist's office. We try so hard to keep people here ON THEIR BONE meds because they are SO IMPORTANT for people who want to stay active and independent. I saw your post and it reeked of someone thumbing their nose at what a lot of us go through, in order to stay on the medicine and have better numbers. It takes dedication and YEARS of commitment. I hope you change your mind.