Speed work for a middle distance runner is very similar to
the more endurance based parts of a sprinters training. We can basically split
this section into two parts.
Firstly, although they don't tend to work on their technique as much as
a sprinter would, it is still vital to run with as good an action as possible.
Some would even argue it is more important, as a poor running technique will
use more energy than a good one and lead to premature fatigue in a race, meaning more technically
proficient runners pulling away in the final lap of an 800 or 1500m race, having conserved more energy
early on.
It is generally preferable to improve technique by practice of drills and
strides prior to a session, as during runs your concentration will naturally
be on the run itself.