The Swede, who first suggested she was falling out of love with the heptathlon after retaining he world title in Osaka last August, is a world-class long jumper.
“I felt a bit empty after Osaka,” Klüft said ahead of last weekend’s indoor Grand Prix in Birmingham.
“I haven’t really got the 100 percent motivation which you need to be good in the heptathlon and to do all the events,” the 25-year-old added.
“Before I quit, I want to give 100 percent in maybe one event or two and not seven events, although I will not retire after Beijing.
“If I am not in the heptathlon in Beijing, I will cheer for the others with all my heart and hope one of my great friends should do well,” added Klüft, who has dominated the heptathlon since winning the world title in 2003.
Britain’s Kelly Sotherton, heptathlon bronze medallist at the Athens Olympics four years ago, insisted she was keen for a re-match with the Swedish star in Beijing even though Klüft would be the overwhelming favourite for gold.
“I would like to her to be there. I understand all her reasons, because what she has done in the last five years has been amazing and she is probably the best female athlete we have ever had,” said the Briton.