and it's been great. I got some tips from some peeps in here about alternatives to running due to massive shin splints and some suggested riding a bike and it's working great. I'm not getting the full intensity out of it that I would if I ran (sweating and such) but it still gets my heart pumping and my breath going. Also been riding on a bmx bike not a mountain bike so uphill I really get to burn my legs peddling. Eventually I plan to slowly work back into running. thanks all for the help!