This article is from the Aerobics Fitness FAQ, by firstname.lastname@example.org (Robles) with numerous contributions by others.
If you feel that you have "pulled a muscle" or have an
inexplicable pain after exercising, the *immediate*
treatment is RICE (rest, ice, compression, elevation).
Icing for 48 hours, every 2 hours for about 10-15 minutes,
*should* help the injured area. However, if you've got an
injury that doesn't respond to RICE in a
couple of days, you should see your physician.