Popsugar Fitness Workouts A 45-Minute HIIT Workout For Beginners and Pros This 45-Minute HIIT Workout Guarantees an Exercise High January 22, 2024 by Jenny Sugar View On One Page Photo 1 of 16 ADVERTISEMENT () Start Slideshow Share This Link Copy ← Use Arrow Keys → 1 Jumping Jacks Begin standing with the feet together, hands by your sides. Jump your legs out as you bring your hands overhead, landing softly. Keep your core pulled toward your spine throughout the movement Jump back to standing, again landing softly. This counts as one rep. Complete for 10 reps. Previous Next Start Slideshow WorkoutsStrength TrainingCardio WorkoutsHIITTabata WorkoutsTabataIntermediate Workouts45-minute WorkoutsFull-Body Workouts