400m and 400m hurdles Mobility
Having good flexibility and range of movement in your muscles allows your body to be able to perform all the training needed of a 400m runner and particularly a hurdler.
We are not saying that you need to have the flexibility of a gymnast, but many injuries are caused in athletics by a lack of range of movement in the major muscles used when running.
Muscles to pay particular attention to are fairly obvious ones in terms of running. This need to be done on a continual basis as training tightens muscles and can cause injuries.
The main muscles to work on a the calf (both with bent and straight legs - to get gastronemius and soleus), hamstring, gluts and quadriceps.
Learn more / further reading