The researchers said that there was also evidence showing that exercise could improve the function of the blood vessels in the brain.

Oily fish seemed to protect against abnormal heart rhythms and inflammation, to stabilise heart rate, lower cholesterol levels and improve the function of blood vessels.

Some complementary practitioners also recommend probiotics and lots of fibre-rich foods to improve the function of the large intestine, which they say can affect our breath.

The most recent renovation occurred between 2009 and 2011 in order to improve the function of the dam's spillways.

Surgical procedures do exist to improve the function of the tetraplegic patient's arms, but these procedures are performed in fewer than 10% of the tetraplegic patients.