What man jumps right up after a good whompin', anyway? Frankly, my blood pressure drops to about 25 over 9 ... and then I have to sleep it off. If you're talking about getting some and going to the gym immdeiately after, then I can see how you might be affected ... but no differently than if you had just run an 800 meter sprint or something and then headed to the gym. An hour or so recovery, I assume, would probably be enough. The "no sex before ..." myth for athletes, which is what I thought you were talking about, was primarily a scare tactic ("it weakens the legs" or "game performance will suffer") to keep them at home the night before a game/contest.