Free treadmill workouts are available from resources such as WebMD and About.com, which features several articles that describe different types of treadmill workouts. The treadmill workouts provided by WebMD are accomplished in 60 minutes or less.
Treadmill workout variations include pyramid speed interval training, hill workouts and workouts designed to alleviate treadmill boredom. Some of the workouts are specifically designed to burn a certain amount of calories. Some ideas for a fun treadmill workout include doing a progression run, implementing speed work and doing walking lunges. A progression run involves trying to run each mile faster than the last one.