Tail running requires your muscles to work slightly differently to road running because of the unpredictability of the surface you will be running on. For example your lateral stability muscles and the muscles in your lower leg have to work a lot harder on uneven, or much softer, terrain. Here are a variety of exercises that will help to keep you injury-free on the trails.
Warm up
The best warm up is to briskly walk over uneven terrain to get your body used to the differences. Start with a slow jog and slowly increase your speed. Improve your ankle mobility before each run by rotating it 20 times clockwise and anti clockwise. Jump 10 times left to right to improve lateral stability.