It depends on your own conditions, if you live in a spacious place, you can buy a treadmill and other fitness equipment, you can run for half an hour during breaks.
If the home place is small, you can shake the hula hoop, but also half an hour, a short period of time is not very useful.
In addition, it is now more popular indoor fitness exercise, do not run without jumping, you can achieve the purpose of exercise. First download a sugar bean app, there is a row of options, one of which is a "home jump", you can choose different intensity of fitness exercises. You can choose from a variety of different workout routines, so you can find the one that suits you.
There are also some moves that you can do while lying on the bed to slim your waistline. There is also a simple action, that is, after lying on your back, let your head droop down from the bed, shoulders and neck are particularly comfortable.
Anyway, as long as you want to fitness, a lot of ways, anytime, anywhere you can twist the waist, press the legs, shrug the shoulders, turn the neck.