Announced by the NSW Health Minister Brad Hazzard on Wednesday, the changes mean gyms will only have to have a COVID-Safe marshal on duty when more than 20 people are in the gym.

However, Fit 2 Function's Adam Brook said other restrictions would need to be lifted for the changes to impact his gym.

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"It will have little impact on us because our classes are still capped at 16 due to other restrictions," Mr Brook told the Leader.

"This means we can keep social-distancing measures in place and we will continue to clean all the gear regularly as we do now.

"Other than that, it won't do a lot for us."

Snake Athletic's Jake Douglas said it was unlikely his business would benefit from the changes, as it had thrived under the new guidelines.

"All of our protocols will pretty well stay in place for the time being," Mr Douglas said.

"We've cut right back because we used to have classes of 30 or 40 people, but now we're back to having classes of 12 to fit into the space.

"Our business is a completely different business to what it was 12 months ago and a lot of the things we've put in our place now we'll keep regardless."

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Mr Douglas said the most beneficial thing for his business would be to have caps on the number of participants in classes removed.

"I think that would be ideal, but we will just keep going with whatever we're allowed to do and try to deliver a premium service," he said.

"It could be worse in terms of possibly not be allowed to open at all, so we will be happy to work with whatever we can."

The new measures will come into place on Friday and gyms will still be required to have a COVID-Safe plan.

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