There are several methods by which

There are several methods by which to improve flexibility, including static and dynamic stretching.

結果 (繁體中文) 1:

有幾種方法通過改善靈活性，包括靜態和動態伸展。

結果 (繁體中文) 2:

有幾種方法可以提高靈活性，包括靜態拉伸和動態拉伸。

結果 (繁體中文) 3:

有幾種方法可以提高柔韌性，包括靜態拉伸和動態拉伸。