"Stretching Does Not Prevent or Treat DOMS (Delayed Onset Muscle Soreness)
Reviews of the scientific literature show that stretching neither prevents nor treats DOMS (Cochrane Database Syst Rev, July 6, 2011;(7):CD004577; Br J Sports Med. 2011;45:1249-1250).
It did not prevent the muscle damage induced rise in plasma-CK, muscle pain, muscle strength and the PCr/P(I) ratio (Scand J Med Sci Sports, Aug, 1998;8(4):216–21).
Stretching does not:
• prevent sports injuries (Clinical Journal of Sports Medicine, March 2005)
• prevent DOMS (Cochrane Database of Systematic Reviews, 2007, Issue 4)
• lengthen muscles (Clinical Biomechanics, June 2014;29(6):636-642). It only increases pain tolerance so you can stretch further.
Other Unproven Treatments for DOMS
Massage: Some studies show that massage decreases pain, but nobody has shown convincingly that massage hastens muscle recovery or increases contraction strength (J Athl Train, 2005 Jul-Sep; 40(3): 174–180).
Massage did not hasten short or long-term recovery and was less effective for recovery than light exercise (J Orthop Sports Phys Ther, Feb 1997;25(2):107–12).
Personally, I've found that stretching or manually manipulating muscles makes them hurt (people say it feels like a good pain), however...
After the "good pain" stops, you only feel "better" because:
A. You're just relieved the pain from the stretch/massage is over;
B. You feel nice from the attention you or the masseur has given you;
C. The placebo effect (you'd hate to admit you were kidding yourself any of this helps).
Now let's see who just reads the thread title and only posts a gut reaction based on their belief in myths from articles from fitness companies selling stretching/massage programs/services.