Workouts

3 Calorie-Torching HIIT Routines

These high-intensity interval methods will amp up your cardio sessions and burn major calories.

by

IFBB Bikini Pro: Marissa Rivero-McGrath

Treadmill Sprints

Why it's her fave: "High-intensity sprints of 15 to 20 secons push fat burning to the max by increasing your heart rate and burning through more calories in a shorter amount of time. And your body will continue to burn more calories long after you step off the treadmill."

The Workout

  • Walk - 1.5 mph, 40 sec
  • Sprint - 10-12 mph, 20 sec
  • Walk - 1.5 mph, 40 sec
  • Sprint - 10-12 mph, 20 sec
  • Walk - 1.5 mph, 40 sec
  • Sprint - 10-12 mph, 20 sec
  • Walk - 1.5 mph, 40 sec
  • Sprint - 10-12 mph, 20 sec
  • Walk - 1.5 mph, 40 sec
  • Sprint - 10-12 mph, 20 sec
  • Walk - 1.5 mph, 40 sec
  • Sprint - 10-12 mph, 20 sec
  • Walk - 1.5 mph, 40 sec
  • Sprint - 10-12 mph, 20 sec
  • Walk - 1.5 mph, 40 sec
  • Sprint - 10-12 mph, 20 sec

Total time: 8 minutes

*Does not include warmup or cooldown. 

Tip: Warm up first for five minutes with some brisk walking or light jogging to get your muscles ready for the intervals and to reduce your risk or injury. 

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