Blue Peter presenter Andy Akinwolere faces his fear of water as he builds up to taking part in the Great Salford Swim.
Great Day of Sport: Manchester, Sunday 15 May. Coverage: Live on BBC Two and BBC Sport website:
Great Manchester Run 1000 BST
Great Salford Swim 1400 BST
Great City Games 1530 BST
The BBC is working closely with the national governing body, British Swimming, to launch a new mass participation campaign called the Big Splash.