This Treadmill Workout Will Probably Be the Most Intense 30 Minutes of Your Day

It didn't take much convincing to see why Sandra Bullock, Amanda Seyfried, and Kim Kardashian all flock to Barry's Bootcamp — 15 minutes into my first class, I was in love. The hour-long mix of high-intensity treadmill intervals and circuit training left me a sweaty mess, and I was already planning my next class on the way out of my first.

While nothing beats the full 60-minute class, the running segments are a workout on their own. For days when strength training isn't in the mix, we have a 30-minute treadmill workout from Barry's Bootcamp trainer Alycia Stevenin to give you a taste of what the class is like. You'll move through sections of intervals, hill work, and sprints, which will challenge both your endurance and speed. While the workout is meant to be done as a whole, you can easily pull out any section and repeat it four to five times if you'd prefer to focus on a specific area.

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