Downhill running refers to the act of running on a slope or decline, which can be found in various terrains such as hills or mountains. This type of running can enhance speed and efficiency, as gravity assists the runner. However, it also requires proper technique to prevent injuries, particularly to the knees and ankles. Runners often engage in downhill running as part of their training regimen to improve their overall performance. It can help build strength in the leg muscles and improve balance. Many trail runners and athletes incorporate downhill running into their workouts to prepare for events like marathons or ultramarathons.