They can be risky if not done with meticulous form. They watch you very closely and make tiny adjustments. I’ve never gotten sore or injured myself with them and now do 100# deadlifts and 75# squats (so far). You should also look into the Onero program with full research on this approach. It is out of Australia with lots of post menopausal women. But not all trainers or approaches are equal. These are two I feel confident about because of their attention to details with firm and small incremental increases. The strength of your musculoskeletal structure is very important to daily functions and longevity and actually improving your condition vs just medicating the symptoms. I’m more interested in reversing the underlying problem. I wish you luck in your own choices and personal approach.