Science
What is HIIT? | High Intensity Interval Training for Runners – Runner’s World
HIIT can take your training and performance to the next level. Here’s everything you need to know about this super effective style of training.

High-intensity interval training, or HIIT for short, was named one of the top fitness trends in the world for 2020, based on an annual survey by the American College of Sports Medicine. This super hard, super effective style of training isn’t just the “it” workout of the moment—of the 14 years ACSM has been conducting this survey, HIIT ranked in the top three spots for six consecutive years.
Why? Because it works, and it works fast. Whether you’re coming straight off the couch, training for a …
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