6 Low-Impact HIIT Workouts That Won't Hurt Your Back, Knees or

High-intensity exercise doesn't need to be high-impact. Here are six low-impact HIIT workouts that'll burn serious calories and build muscle — no jumping required.

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12-Minute Low-Impact HIIT Workout (No Jumping)

12-Minute Low-Impact HIIT Workout (No Jumping)

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