Interval training means adding short speed bursts into your run. Rather than always going at a steady pace, adding speed intervals helps you run faster overall but also helps increase your endurance. There's lots to keep track of in an interval workout to keep your brain busy, so interval work is good at beating boredom.
There are many ways to add interval training to your running routine. You can add intervals to your treadmill workout, play around at a track (here's a fun workout to try), or go casual and try a fartlek workout. You definitely get bonus points for knowing the term fartlek, which is Swedish for speed play. In these workouts, you fun faster for however long you want, like to the next stop sign or the next intersection.
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