Mang miếng đệm đầu gối. Tránh gập đầu gối và ngồi xổm. Tránh bài tập thể dục và môn thể thao có tác động mạnh đến đầu gối. Ăn thực phẩm chứa chất kháng viêm. Tránh hút thuốc.

I'm interested in that, but I only have a few mins. Can you give me at most the first 500 characters of a detailed explanation in English about that?
If you spend a significant amount of time sitting on your knees, such as for landscaping or housework, wear cushioned knee pads. If possible, take “micro breaks” of 10-20 seconds frequently. During these breaks, stand up and stretch your legs. Allow your legs to return to their resting position. Repetitive motions that use your knees should be avoided if you want to prevent swollen knees. Many sports, especially those that require a lot of jumping and running, can be damaging to your knees. Avoi