How can I stay in shape while traveling?

One of the things that I would do myself back when I was younger and traveling, back in the days when I was traveling, hotels didn't have gyms the way they do today. So, whenever I went on vacation, I had to work out with whatever I had and what I would usually do is use a lot of plyometrics. And plyometrics are explosive movements. And in explosive movements, you get more bang for your buck than you would in an ordinary movement. So, for example, things like vertical jumps where you squat down, jump as high as you can, and come back down and keep on going.