Do yoga. My job is also sedentary. If you don't exercise for a while, you will feel uncomfortable in your waist, but if you go to the gym for a yoga class or two, you will be refreshed and light as a swallow. So yoga can't be said to be good, but it is really good for body and mind, and it can be one of my hobbies that I have been insisting on for many years. Although most of the people in the yoga studio are girls, there are also boys. I met a male classmate I knew in the yoga studio before and asked him why he came. He said his waist is not good. Let's exercise and stretch. If you feel uncomfortable, you can practice with video at home.