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Water immersion has the potential to provide benefits to the brain.

Research in the School of Sport Science Exercise and Health have found it increases blood flow to the brain.  Research associate Howard Carter says the study raises the possibility that increases in blood flow through the brain's cerebral arteries may improve not only vascular health, but also cognitive function.

"Studies on the positive effect of exercise on heart health have been numerous, but we are taking a different angle and are interested in the link between heart and brain health," Mr Carter said.

"To our knowledge, ours is the first examination of the effect of graded euthermic [warm] water immersion on cerebral blood flow.

"We found that brain blood flow is higher when subjects were immersed in water up to the level of the heart compared to on land-laying the ground work for further investigation of its effects on cerebrovascular health."

Results from the study showed blood flow to the middle cerebral artery increased by 14 per cent and posterior cerebral artery increased by nine per cent when subjects were immersed in water.

Subjects were nine healthy males who were positioned in a tank in a standing position and asked to remain as still as possible.

After a 10 minute period of rest, three submersible water pumps filled the tank at a constant rate with warm water to the level of the heart.

Researchers used ultrasound to record the velocity of blood travelling through the cerebral arteries.

Mr Carter said the findings highlighted the potential benefits of aquatic-based activities.

"As with land-based exercise, different types of water-based activities, such as water aerobics and swimming, have slightly different effects on heart function and cerebral blood flow so each would require further investigation," he said.

Researchers have now embarked on a six month exercise training study to investigate whether exercise training in water might lead to consistently greater increases in cerebral blood flow compared to exercise on land, and whether this may lead to greater improvements in vascular health and cognitive function.

This article, written by Lizzie Thelwell, was first published by Science Network WA.