@njx58
These are all good exercises for increasing bone density.

My go-to physio is on UTube and he also recommends these in addition to a few others. He is a Brit specializing in the over-50 crowd with a no-nonsense approach for many issues including this one for increasing bone density. https://youtu.be/e_Tr8AeULzI

He has also helped me with relieving knee and hip pain. Very pleased and surprised with those results. He explains things really well and charmingly convinces you that something is better than nothing. He does not overdo it so you always feel capable of trying---both physically and time-wise and often suggests what he calls 'exercise snacks,' quick repetitions throughout the day especially while you are doing something else.

After years of producing free videos, he has recently started promoting his book....not pushy and I just skip over any promotions, although I intend to purchase his book with my next Amazon order.