Frida Karlsson's Olympic debut began with a collapse after the skiathlon, then she finished in the 10 kilometer classic and lost a lot on her relay distance.

In the talk show Carina Bergfeldt, roommate Maja Dahlqvist talks about how Frida Karlsson returned to the hotel room early after a race and was completely out of energy.

- She goes to bed with all her clothes on and falls asleep.

I just "but wait, this is uncomfortable, you can not sleep now" because she is completely gone.

She has run out of energy so much that she just wants to sleep, says Dahlqvist.

"What are we doing?"

She further tells how she got Karlsson into the shower but that she was also falling asleep on the floor there.

- At the same time, I pour juice into her because she has to get hot and she has to get energy.

It was still uncomfortable I think.

Then I thought "what are we doing, are we going to compete and try to win medals and then we are completely fainted?".

Dahlqvist called for medical help and they got energy in Karlsson, and the 22-year-old then got the go-ahead that she could go to bed.

Now the weekend's World Cup competitions in Lahti are waiting for the duo.

Carina Bergfeldt is broadcast on SVT1 21.00 tonight and on SVT Play from 17.00.