High intensity interval training (HIIT) workout Incorporate high intensity interval training into your workouts to increase fat loss and maximise your results. Exercise scientist Johann Ruys shares his favourite HIIT workout.3 x 1km runs with 2-minute rest in between each (work-to-rest ratio = 2:1)2-minute rest4 x 500m runs with 2-minute rest between each (work-to-rest ratio = 1:1)2-minute rest4 x 150m runs with 1-minute rest in between each (work-to-rest ratio = 1:2)6 x 30m sprints with 10-second rest between each (finisher)Join the movement on Instagram and hashtag #myWHF so we can see what you’re up to!