Hi thanks for your query and welcome to lybrate. I am Dr. Akshay from fortis hospital, new delhi. You are very young and there is no reason for a low bone density.
But since you have mentioned it, can you kindly tell me whether you have done proper two site dexa
test or is it just
being done by a small machine which estimates your bone density by your heels or any one region? also what do you mean by strengthening of arms, is it muscles you want to build then best way is to do regular exercises in gymn, take adequate calcium and vitamin d supplementation as is required and lead a heavy lifestyle, your muscles will build up subsequently. Do not hesitate to contact me if you need any further assistance.