Best Cardio Workouts

Get a Bikini Body in 4 Weeks: Slim with Intervals

Do this routine on the treadmill or elliptical, or walk or run outside.
Try 35 minutes of longer bursts.
5 minutes: Warm up at an easy RPE 4 pace.
2 minutes: Go at a moderate RPE 5 pace.
3 minutes: Pick it up to a brisk RPE 7 pace.
2 minutes: Back to RPE 5.
4 minutes: Speed up to RPE 7.
2 minutes: RPE 5
5 minutes: RPE 7
2 minutes: RPE 5
6 minutes: RPE 7
4 minutes: Cool down at an easy RPE 4.
Calories burned: 153 (walk) to 373 (run)