Klüft is 1.78 m (5 ft 10 in) tall and weighs 65 kg (140 lb / 10.2 stone). Her physique is well-suited to multi-events: she is tall and lean for the running and jumping events but also powerful enough to perform well in the shot put and javelin. She has shown more natural ability in the jumping events, sprinting and hurdles, and has steadily improved in the throwing events and 800 m and has now been described as having no weaknesses across the seven events. This is demonstrated by her finishing in the top six in all disciplines of the 2007 World Championship heptathlon.