HIIT workouts are typically only 10-30 minutes long, but you'll go all-out for the high-intensity portions of the workout, followed by rest or active recovery periods. "The pattern of bursts followed by rests is highly effective for fat loss and increasing your metabolism, so it's ideal to incorporate HIIT in your workouts one to two times per week in place of steady state cardio," Chadwell told POPSUGAR.
Try this beginner's routine or any of the HIIT workouts on this list, choosing a different workout each week to keep things fresh.
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