I've used the $15-an-hour private gym-in-a-box in Singapore. It's not perfect, but it helps me get fitter without my workout anxiety getting in the way.

• The private gym-in-a-box concept is so popular it's now expanding across the world.
• I balked at the price at first but came to love it as a space for working out without anxiety.
• Now that I'm further along in my fitness journey though, I can't quite justify the price of using it regularly.

The private gym in a box is a concept that's popular and going global now, but it began in Singapore. I balked at the concept at first, but now think it fills a unique niche.