Popsugar Fitness 1Six8 1Six8's 23-minute HIIT Workout This 23-Minute HIIT Workout Will Get You Trim and Make You Look Younger 3 April, 2017 by Linda Cochrane View On One Page Photo 3 of 13 ADVERTISEMENT () Start Slideshow Share This Link Copy ← Use Arrow Keys → 3 Plyometric Lunges Start standing. Lower down into a lunge, then jump and switch your legs rapidly in mid-flight to land with the opposite leg forward. Previous Next Start Slideshow 1Six8HIIT WorkoutsExerciseHIIT