How can I run without a treadmill at home?

If you don't have a treadmill at home and want to run, you can wear a mask to protect yourself and go downstairs to the community or a nearby park to run. Besides, running outdoors is healthier than running indoors, at least the outdoor air is fresher, and some scenery will make you feel happy during running. If there is no treadmill indoors, it is best not to run directly on the floor, so the residents downstairs will become very noisy.