Stretching

This is the link to a well written (and not too long) article about stretching- static verus dynamic.

Static vs. Dynamic stretching by Taylor Tollison.
Recommended reading :)

Summary

Current research work detailed in Medicine & Science in Sport and Exercise 33(3), pp354-358 and Journal of Strength and Conditioning Research, vol 15 (1): 98-101 suggests that the use of dynamic stretches - slow controlled movements through the full range of motion - are the most appropriate exercises for warming up. By contrast, static stretches are more appropriate for the cool down at the end of the session.