I do Onero. I have osteoporosis after cancer treatment.
1) You build muscle which puts firm pressure on your bones
2) you do specific weight bearing exercises which burden the bone safely without dangering yourself. Very well supervised in small classes. 5-10 exercises set up like a circuit and you all rotate with a great supervising exercisologist trained in the program.
It has greatly helped me regain a lot of balance ( muscle and nerve damage from chemo ) leaves you unable to balance the same. It's very disconcerting but the program slowly rebuilds your abilities and strength.
I'm in Northside Brisbane Australia
It's a very very good program. My skeletal was terrible thin just 53 kg finishing chemo but I feel muscle already and healthier and stronger. 45 mins 1 or 2 times a week supplement in between at home.
I'm avoiding bone medicine to see first the progress. Fingers crossed and prayers too.