Take your next high-intensity circuit outside! Try these four outdoor HIIT workouts to build endurance, strength and more — without stepping a foot in the gym.
Outdoor Workout
High-intensity interval training - Wikipedia
Outdoor Fat Burning HIIT - No Equipment Required
Why You Should Do Outdoor HIIT Workouts
Why You Should Do Outdoor HIIT Workouts
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A 19-Minute HIIT Workout for Beginners - The New York Times