Static stretches -- e.g. the classic "stretch and hold for 30 seconds" -- do not actually offer any benefits.

They do not loosen you up; in fact, they actually weaken your muscles for a brief period. They do not increase your flexibility; that's pretty much set, and only massive amounts of daily stretching would slightly improve your flexibility, and even then only briefly. They do not reduce injury rates.

Dynamic warm-ups are much better, as they do actually loosen you up and get you ready to exercise. Cruising at an easy pace for ~10 minutes should do the trick.