Professional athletes often experience extreme highs and lows, and can often be the last to realise they have depression.

Cricketer Andrew Flintoff, who has suffered from the condition, has been exploring the issue for a BBC documentary.

Psychotherapist Philip Hodson discussed some the issues it raises on BBC Breakfast.

The Hidden Side of Sport is on BBC One at 2245 on Wednesday 11 January, and available later on the iPlayer.

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http://www.bbc.co.uk/news/uk-16501970