Here are a few tips when using poles while running the trails. Steve discusses how to use them.

Trail running poles will help you conserve energy when running or hiking up steep uphills. When running on hilly terrain, the extra power your arms provide can help you run faster and more efficiently. When descending, poles can help you avoid obstacles, keep your balance and help you slow down.

https://youtu.be/pci9ZHWcA8g