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A simple guide to high-intensity interval training, or HIIT, the fitness trend du jour.
Is HIIT more effective than steady-state cardio?
Science of VO2max Intervals: A Comprehensive Guide for Endurance Performance
The Magic of Interval Training. Just how good is high Intensity…, by Alex Fastfitness, Fastfitnesstips
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High Intensity Interval Training Part 1 - The Science
Is high-intensity interval training (HIIT) the most efficient way to work out? - Vox
Is High-Intensity Interval Training (HIIT) Worth the Hype?, by Samir S., In Fitness And In Health
HIIT, HVIT, or VIIT: Do you Know the Differences? - NASM