Kristjan Rahnu (born 29 August 1979 in Kohila) is a retired Estonian decathlete.

[1] His personal best dates back to 2005 when he did 8526 points in France, Arles on June 4–5.

After many injuries and other issues, Rahnu is trying to make a successful return to the sport in 2009 for the first time since the European World Championships in 2006.

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