N4x4 1.32

The N4x4 app offers a streamlined approach to enhancing your VO2 Max and overall fitness levels through the Norwegian 4x4 HIIT protocol. This scientifically supported method focuses on high-intensity interval training to improve cardiovascular capacity, an important indicator of health and longevity.

The application simplifies the workout process by eliminating manual timing. Users initiate a session with a single press, and the app synchronizes visual and audible cues marking each high-intensity and recovery interval, allowing for uninterrupted focus on performance.

Designed to accommodate both novice and experienced users, N4x4 provides customizable settings and guides you through a structured routine, including:

• 5-minute warm-up
• Four rounds of 4-minute high-intensity intervals, each separated by 3-minute recovery periods

The effectiveness of increasing VO2 Max has been corroborated by researchers such as Dr. Peter Attia and Dr. Rhonda Patrick in their respective discussions on health optimization, underscoring the potential long-term benefits of this training protocol.

This app is free to use, without registration requirements, advertisements, or in-app purchases. It presents a practical tool for those aiming to strengthen cardiovascular health through efficient, guided HIIT workouts.