Owning and operating a gym in the Covid-19 era is like running a marathon, except you’ve stopped for two hours and now need to build up momentum again. That’s according to Gym Plus CEO Dirk van der Flier. “We’re delighted to be back open. It was devastating being shut for four or five months, that was really hard. So it’s great to be back open,” says van der Flier. Then he adds: “It’s not like the way it used to be.” Rather than “butcher” his business model, Van der Flier decided to take out a €500,000 bank loan, which he…