Hiking is the preferred term for a long, vigorous walk, usually on trails, in the countryside, while the word walking is used for shorter, particularly urban walks. It is a popular activity with numerous hiking organizations worldwide, and studies suggest that all forms of walking have health benefits. A day hike refers to a hike that can be completed in a single day. This specifically refers to difficult walking through dense forest, undergrowth, or bushes, where forward progress requires pushing vegetation aside.