Fact checked by Jennifer Klump Key Takeaways A recent study found that HIIT helped healthy older adults lose body fat and ...

Moderate intensity exercise encompasses activities that are somewhat challenging for you to perform and raise your heart rate. It may help lower your blood pressure and cholesterol, balance your blood ...

Getting moderate-intensity aerobic exercise burns the same amounts of fat and carbohydrates as fuel. Resistance training builds muscle, which helps you burn more calories long-term. Activating your ...

Beth Skwarecki is Lifehacker’s Senior Health Editor, and holds certifications as a personal trainer and weightlifting coach. She has been writing about health for over 10 years. October 21, 2025 Add ...

It feels good to push the body to the point of exhaustion. Leaving the gym or a fitness class soaked with sweat is a deeply satisfying manifestation of the endorphins humming around in your brain.