400 Calorie Tush Toning Interval Workout

If you want to burn 100 calories in 10 minutes, and tone your tush and legs at the same time, go for a run. For even greater lower-body-sculpting power, you'll need to add hills to your workout.

I know. I know. Hills suck! And if running up hills is way too challenging, walking briskly will do the same magic. This interval workout combines walking hills and short sprints with just a bit of incline to reduce the chance of developing shin splints. Aside from a toned tush and thighs, intervals are also proven to target belly fat, so it's doubly effective. In about 40 minutes, you'll burn over 400 calories!

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