"Hearst Magazines and Yahoo may earn commission or revenue on some items through these links." Like other HIIT-style workouts, the method contains spurts of high-intensity exercise and active recovery ...

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Lack of time is often the main reason people don’t exercise regularly. But a type of interval workout recently popularised by ...

New research shows the 4x4 workout format can improve fitness faster than traditional workouts, such as jogging or cycling ...