Summary:
- This article discusses the science behind the high-intensity interval training (HIIT) workout that has become popular among celebrities.
- HIIT involves short bursts of intense exercise followed by periods of rest or lower-intensity exercise. Research shows that HIIT can improve cardiovascular fitness, burn calories, and boost metabolism.
- The article explains how HIIT works by increasing the body's production of mitochondria, the "powerhouses" of cells, and improving the body's ability to use oxygen more efficiently.