fishoutawater:
Sounds like sage advice island guy, but reading this thread, I have to wonder how the Navy SEALS deal with this. I'm guessing that when they do a beach insertion it involves egressing a submarine, taking a ride in a DPV, then swimming underwater for some distance. Suppose they sit on the beach for a while after they come out of the water? I doubt it.
Cardiovascular activity increases gas exchange between lungs, blood, and tissues in both directions. This is how our metabolisms work, and it also has the same effect on the inert gasses we breathe. In other words, if we exercise at depth, we accelerate the *on*-gassing of inert gasses. If we exercise on the surface after a dive, we accelerate the *off*-gassing of inert gasses.
The problem with post-dive exercise comes from the mechanical action of our joints, muscles, and connective tissues. This movement can potentially cause gasses dissolved during a dive to cavitate into bubbles.
However, back to the effect of increased cardiovascular activity... With elevated circulation and respiration comes an increased partial pressure differential between blood and tissue, making bubbling less likely. The increased blood flow makes it easier to "flush" bubbles to the lungs before they become a problem. The increased respiration makes it easier for the lungs to filter the bubbles from the blood. So, it is quite reasonable to imagine that under certain circumstances, the benefits of increased post-dive activity take care of the costs.
There are numerous studies that have found post-dive cardiovascular activity to *reduce* venous bubbling, though you must balance this with the findings of other studies, as well as real-world accident data, that post-dive exercise can also bend the snot out of some people. It is tempting to say that a diver should increase their cardiovascular activity in a way that limits joint stress, say riding a bike or swimming laps, but there is no way to know where the line between benefit and risk would fall for any given person on any given day.
Oh, and if you are in the physical condition of a SpecWar dude, you are also likely to be even more resistant to bubbling and its effects.
Cameron