It is apparently the first and only randomized trial to test whether people who work out at gyms with modest restrictions are at greater risk of infection from the coronavirus than those who do not. The tentative answer after two weeks: no.

So this week, responding to the study it funded, Norway reopened all of its gyms, with the same safeguards in place that were used in the study.

Is there hope for gymgoers in other parts of the world?

“I personally think this is generalizable, with one caveat,” said Dr. Michael Bretthauer, a cancer screening expert at the University of Oslo who led the study with Dr. Mette Kalager. “There may be places where there is a lot of Covid, or where people are less inclined to follow restrictions.”