This is a lower body hiit cardio workout for busy people. If you don't

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Exercise Vigorously for 4 Seconds. Repeat. Your Muscles May Thank You. - The New York Times

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16 Insanely Effective HIIT Workouts To Try On Your Gym! - Spark Membership: The #1 Member Management Software

HIIT Workouts For Men [Fat Burning and Muscle Building After 40]

30-Minute Workout Classes for Busy People

Quick five minute high intensity, interval, cardio workout. Also known

A no-sweat, full body workout for a busy December

The Weekend-Only Exercise Plan - The New York Times

HIIT benefits: 68 benefits of high-intensity interval training