Dorsiflexion is a good running tip because it can help to improve your running form and prevent injuries. When you have good dorsiflexion, your foot is able to absorb more shock when you land, which can help to protect your joints. It also helps to improve your running economy, which means that you can run more efficiently and with less effort.

Here are some of the benefits of good dorsiflexion for running:

Reduces the risk of injuries. When your foot has good dorsiflexion, it is able to absorb more shock when you land, which can help to protect your joints from injury. This is especially important for runners who are prone to injuries such as shin splints, runner's knee, and plantar fasciitis.
Improves running economy. Running economy is a measure of how efficiently you are able to run. When you have good dorsiflexion, you are able to run more efficiently and with less effort. This means that you can run for longer periods of time without getting tired.
Allows you to run faster. When you have good dorsiflexion, you are able to generate more power when you push off the ground. This can help you to run faster and with more force.
If you are looking to improve your running form and prevent injuries, then it is important to work on your dorsiflexion. There are a number of exercises that you can do to improve your range of motion. You can also see a doctor or physical therapist to get personalized advice.

Here are some exercises that you can do to improve your dorsiflexion:

Toe raises: Stand with your feet shoulder-width apart and raise your toes off the ground as high as you can. Hold for a few seconds, then lower your toes back down.
Calf raises: Stand with your feet shoulder-width apart and slowly raise up onto your toes. Hold for a few seconds, then lower back down.
Ankle rolls: Sit on the floor with your legs extended in front of you. Roll your ankles clockwise and then counterclockwise.
Wall calf stretches: Stand with your toes against a wall and lean forward until you feel a stretch in your calves. Hold for a few seconds, then relax.
It is important to start slowly and gradually increase the intensity and duration of your exercises as your dorsiflexion improves. You should also listen to your body and stop if you feel any pain.