I was having hip pain when I walk, and someone told me it might be because I slouch over a bike or keyboard all day. I made a conscious effort to straighten up, and my hip never hurts now. I discovered that it's all in my head position. If I tuck my chin in because there's snow in my face, my hip hurts, when I put my head high, the hip is better and my face stings with snow (so I wear a balaclava for walking)!