It has been two weeks since Kalle Berglund broke up.

It was in the middle distance runner's first race after the covid vaccination that forced him to rest when he became ill.

In between, the 25-year-old has been in a high-altitude camp, which is believed to be the reason for the collapse during the Diamond League, says coach Janne Bengtsson.

- He was not recovered from the training camp.

When you are not a hundred, it feels like the lactic acid just comes and then it is not possible to run, he says to SVT Sport and tells that the test results did not give any unexpected results:

- It was very positive.

There were no problems with that, and we did not really think so either.

It was only because we had been at high altitude and not recovered properly.

How is he now?

- It's just fine.

Then he did not feel well, but now it is completely different.

The Olympics should not be in danger?

- No, now he will be ready for Tokyo, says Janne Bengtsson.

Kalle Berglund and Janne Bengtsson travel to Japan on Thursday.

Athletics begins on July 30.