Not the hips, no ... just like cycling, running all happens in the sagittal plane, and only in one direction. Weak hips can cause even more trouble for runners than they do for cyclists.
Targeted hip strengthening exercises, or yoga (or both).
What running brings that cycling doesn't is the weight bearing and impact, for strong bones.
ETA: if you wanted to add an aerobic sport to strengthen your hips, try board sports. Do NOT add a cutting sport (like soccer) until you've strengthened your hips - that's a very common way that women, especially, injure our knees (BTDT).
Last edited by OakLeaf; 12-13-2010 at 07:46 AM.
Speed comes from what you put behind you. - Judi Ketteler