A CK-MB test may be used as a follow-up test to an elevated CK in order to determine whether the increase is due to heart damage or skeletal muscle damage.
Scuba organizations say recreational divers shouldn't go below about 130 feet, but one Egyptian diver recently ventured a bit deeper -- going more than 1,000 feet below the ocean surface and setting a world record in the process.
How deep do dolphins dive? It's hard to say how deep oceanic dolphins can dive because most of the 32 species have not been studied. Bottlenose dolphins are shallow divers and typically don't go deeper than 150 feet. In the Indian River Lagoon the deepest waters are only 10 to 12 feet deep.