Treadmill workouts?

Bump up the incline and do hill work.

Lots of things to do with treadmill.

I am a treadmill runner and do all my marathon training on treadmill.

Increasing incline would help with building your quad strength. It is especially useful when you are running in a hilly race. The only problem is that treadmill in general does not decline below flat level, so it does not help you train for the downhill run.

Increasing and then decreasing the speed in a bell curve shape will help you increase your speed as well. Start at a lower pace, slowly increase your speed to above your maximum speed, then gently decline to lower speed would help you become a faster runner without making you tired out too quickly.

Also, a lot of treadmill has heart rate monitor function. By monitoring your heart rate, you will be able to determine the optimal heart rate for you to maintain the optimal cruising pace. In a race, you want to learn to achieve that optimal heart rate, which will give you the best efficiency – a combination of a good speed at the longest duration. Treadmill will teach you to learn to pace yourself at that rate to achieve that heart rate.