Adam Drzazga, a member on the British Freediving Team and Blue Water Freediving School, worked together with the BBC on a documentary about oxygen consumption in mammals.
Click on the two links below to find out more about this fascinating project and to hear what Adam has to say:
Man v Seal: www.bbc.co.uk/news/science-environment-22870944
Freediver Reveals Breath-holding Secrets: www.bbc.co.uk/news/science-environment-22876741