Since all gyms are closed in my country, I've converted my attic in a "make shift" gym. I've placed a desk, installed Ubuntu on an old laptop, placed a screen, put down a mat and some dumbells and just watch cardio and resistance workouts on YouTube. It's a great way to keep myself in shape and to break the day because I work from home all days.
I'm doing something similar. In normal times, I go to the gym every day or two and work out for an hour and a quarter. Since I'm now home all day, I've been doing bodyweight and dumbbell workouts next to my desk for fifteen or twenty minutes several times a day. They break up the monotony and refresh my mind for the next round of work. I also fit in extra exercise during Zoom meetings that I only need to listen to.
The result has been that I am staying in shape despite being indoors all day. The staggered workouts may be more effective at building muscle than my usual gym sessions, too.
The greatest benefit of the exercise, though, is the mood elevation.