hi, Thank you for providing the brief history of you. First we need to know what cancer you had and how was the treatment planned. Due to chemotherapy and radiotherapy there will be possibly loss of muscle strength and also the bone density. But its not a matter of worry as we can regain back all the possible benefits with later approach. You can discuss the same with your physician. Undergoing a balanced diet, nutrition, Sun bath, Calcium supplement etc will surely help further. Also for good absorption of all of the above you need to perform the regular exercises which will include - aerobics, strength conditioning, weight bearing exercises, etc. By undergoing a meeting with a qualified physical therapist will help further to put more inputs to the various protocols to help you in balancing the close normal functions. Also, the time may be a factor here, it may not be short duration but a longer one will surely provide the help to you. I have seen many with the same issues and have worked out based on the medical reports and we could achieve back the bone strength. But we took a pretty fair time. Regards Jay Indravadan Patel