Hi I m a 57 year old healthy woman. The last few days I ve experienced weird symptoms. Yesterday, reaching for an item on a waist high shelf I pulled a muscle in my back. Today, just doing normal activities I have a huge pull in my left quad that won t release. I m active and healthy,,,,,am I lacking a vitamin? This seems rare for me and I wanted some advise. I drink lots of water and exercise. I did have a back injury and have been a bit slower than usual but I ve been back to my almost normal self. Any suggestions? Thanks for your time and I look forward to hearing from you. Regards, Sue