Researchers from the University of Southern Denmark investigated how eight weeks of high-intensity interval training affect the structure of mitochondria—the parts of muscle cells that produce energy.

Dr. Shields is a physical therapist with a background in English Literature and a passion for healthcare and education. She hopes to combine her clinical expertise with her love of writing, establish ...

In 1996, Dr. Izumi Tabata published a groundbreaking study on high-intensity interval training, or HIIT, and its effects on aerobic (VO₂ max) and anaerobic capacity in young, physically active men ...

High-intensity interval training (HIIT) has emerged as a highly efficient exercise strategy that encompasses repeated bouts of vigorous effort interspersed with recovery periods. This method has ...

A HIIT workout can be tricky to define because, at its core, it just means a string of exercises that gets your heart racing, providing a cardio boost to what would otherwise be a serviceable, but ...

Good news: starting your running journey doesn't have to require diving in head-first and sprinting for 30 minutes straight. If you’ve never been much of a runner (or you’re starting to get back into ...

These brief, intense workouts can strengthen your heart and boost longevity.

Burn fat, increase your strength and power up your cardio fitness fast, with this high-intensity interval training workout Efficiency is the name of the game when it comes to high-intensity interval ...

Every so often, a new type of workout seemingly takes the fitness world by storm. The latest in this long line of buzzy fitness fads: the Norwegian 4x4 workout, a high-intensity interval training ...

There’s a lot of talk in the exercise world about high intensity interval training (HIIT) lately, which is exactly what it sounds like — alternating episodes of exercise with periods of less intensive ...

Forbes contributors publish independent expert analyses and insights. AI researcher working with the UN and others to drive social change. Oct 20, 2025, 05:19am EDT A humorous animated brain character ...