Osteoporosis in Post-menopausal Women

Osteoporosis is a systemic bone disorder characterised by a reduced bone mass and structural deterioration, increasing the risk of fragility fractures, particularly in women post-menopause. Bone mass and structure can be assessed by scans. Antiresorptive medications are commonly prescribed to reduce bone resorption, preventing further bone loss and thus reducing the possibility of fracture. Exercise can also benefit bone mass and structure but current evidence do not show whether exercise is more, or less, effective in combination with antiresorptive medication. This study will compare the effect of a brief, home-based exercise programme on bone mineral and structural properties in women taking/ not taking antiresorptive medication.

The goal of this clinical trial is to study the effects of discontinuation of Alendronate treatment for three years. The participants are postmenopausal women with osteoporosis, who have had a treatment period without fractures. The study will answer: * What is the rate of fragility fractures during the study? The hypothesis is that discontinuation of Alendronate after a fracture-free period does not raise the 3-year fracture risk. * Are there predictors of significant bone loss after discontinuation of Alendronate? The hypothesis is that clinical, biochemical, cellular, or molecular characteristics can predict bone loss. Researchers will compare the outcomes of discontinuation of Alendronate with continuing treatment. Participants will be randomly assigned to a group. Participants will: * Either take alendronate once weekly for three years OR discontinue their treatment * Visit the clinic at 6 and 18 months for blood samples * Visit the clinic at the start of the study and after 1, 2, and 3 years for bone scans and blood samples.

The aim of this clinical trial is to investigate the effectiveness of romosozumab started without stopping denosumab in patients diagnosed with postmenopausal osteoporosis with a very high risk of fragility fractures and who is under at least 2 years of denosumab treatment. The main questions aimed to answer are: * Does it effective to prevent fractures add Romosozumab to ongoing denosumab treatment? * If it is appropiate to quit denosumab for starting 1 year romosozumab treatment? * If there is complications in denosumab and romosozumab combination treatment? Researchers will compare the Romosozumab 210mg subcutaneous(sc) monthly plus denosumab 60mg per 6 months sc treatment to prooceeding denosumab treatment and romosozumab 210mg monthly treatment in patient whom denosumab cessaced. Participians are postmenopousal women with osteoporosis and they are under at least 2 years of treatment with denosumab and they will: * Add 210 mg monthly romosozumab sc injection or switch to 210 mg monthly romosozumab sc injection or proceed 60mg per 6 months denosumab sc injection * Visit the clinic at least once every 3 months and first month of new treatment regimen, blood tests per 3 months and Bone mineral density examination per 6 months * Keep a diary of their symptoms