I love to run, but a few years ago (age 47) was diagnosed with osteoporosis after an ankle stress fracture. My 80-year old dad used to run marathons, but had to stop when he started having back and hip problems. This past August, Dad had hip replacement surgery and is now walking 5 miles per day. He told me he would love to run another marathon. I would like to run it with him. Would this be safe for me to do with a history of osteoporosis?View Thread