High-Intensity Interval Training (HIIT) has become one of the most effective fitness strategies in the United States for ...

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

Interval walking alternates slow and fast paces to boost intensity. People of all fitness levels can benefit from interval walking. Gradually increase the frequency and intensity of your interval ...

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

Everything you need to know about high-intensity interval training to help you hit the ground running in 2026—including a low-impact HIIT workout alternative.

Step into a healthier future, stride by stride. The varied paces in interval walking enhance your body’s ability to deliver oxygen to muscles. “Adding higher-intensity intervals pushes your ...

Beth Skwarecki is Lifehacker’s Senior Health Editor and has been writing about health, fitness, and science here since 2015. Beth was the recipient of the 2017 Carnegie Science Award in science ...

Please provide your email address to receive an email when new articles are posted on . Short-interval high-intensity exercise improved peak VO 2 more vs. moderate-intensity training after stroke. A ...