Do any of you who cross-train have experience with sore quadriceps after running? I run very rarely, but when I do, I end up with sore quadriceps the next day, even if I take it easy I don't quite understand, as these, obviously, are the leg muscle group that are most developed from cycling. Is there something about cyclists' overdeveolped quadriceps that make them susceptible to soreness when running? I don't recall ever having this when I ran, back before I rode. Any suggestions regarding training/stretching to ameliorate the problem?

Because I have business travel, I'm hoping that occasional running will be a good substitute when I don't have access to a bike. But with the soreness, I can only run one day - after that I'm recuperating from leg soreness.