The injury occurred in Sälen, where the party leader is to participate in the People and Defense conference. Communications manager Odd Guteland tells SVT Nyheter that Andersson visited the local health center on Sunday after overexerting himself as a result of several days of skiing.
On Instagram, the party leader posted a picture of her standing with crutches.
“I really enjoy skiing. There has been a bit too much of that stuff this week. My knee therefore needs to rest for a while now,” writes Andersson.
At lunchtime, Magdalena Andersson and Prime Minister Ulf Kristersson (M) are expected to give their speeches, which SVT broadcasts live.
The whole thing was initially described as an accident, but later the Social Democrats said it was an overexertion.