[cummings66]

Here's one about pre hydration, again looks like it works.

Preventive Effect Of Pre-Dive Hydration On Bubble ...[Br J Sports Med. 2008] - PubMed Result

Here's the one about exercise before a dive, looks like it's a VERY good idea.

Aerobic exercise 2 hours before a dive to 30 msw d...[Aviat Space Environ Med. 2005] - PubMed Result