We've been seeing a lot of people wearing compression socks. It's something of a fad at Ironman. But not without good reason: The legs swell, sometimes for a few days, after long runs. Another way to help the body recover is to move your seat to the base of a chair or coffee table and rest your calves on top of it so that you have 90-degree angles at the knees and hips. Stay there for 20 breaths or more. This will help with cramped, swollen legs, and will also encourage relaxation after an intense run.
Benefits: Helps with recovery and reduces swelling.