the bends

The four crew members spent two days “pre-breathing” to prevent becoming seriously ill from decompression sickness, known as getting “the bends”, as the pressure changed.

The flight team has taken the challenge as an opportunity to do tests on the impact of decompression sickness, also known as the “bends” and the blurry vision astronauts can sometimes experience in space called spaceflight associated neuro-ocular syndrome.

If a diver returns to the surface too quickly, the nitrogen bubbles don't have time to dissipate - leading to a dangerous condition known as decompression sickness, also known as the bends.

"The bends and turns of the river could potentially negatively impact dolphins' echo-location."

Decompression sickness, also known as "the bends", is a problem typically associated with scuba diving, which bubbles form inside the body due to a change in external pressure.