In a free diagnosis camp, I got to know that I have osteoporosis (T score -3.5). Post this I got my full checkup done, all other tests are good except (Vit D 11.98) & B12 88) which are towards insufficiency end. Though my lifestyle was sedentary but I have picked up running in last 5 years and have run quite a few half marathons. I have left all this as I have developed foot pain and weight again increased post quitting running. After a gap of a year, I have again started workouts and I run 2 km 3-4 times a week and do 30 min walks daily, followed by workout. I do these exercises in park so get some sun exposure as well. I am 39 year old (Wt 85 kgs), my legs pains whenever I run fast now. Pls advise what should be done so that I can continue running long.