The Norwegian 4x4 Protocol is a cutting-edge approach to exercise that can significantly boost your cardiovascular health and stamina. It consists of four intense four-minute intervals at 90-95% of your maximum heart rate, each followed by a three-minute recovery period. This scientifically backed method is renowned for its efficiency in improving VO2 max and overall endurance.

Master and enhance any workout or exercise routine with TimerLabs. This advanced interval timer is designed to elevate your fitness experience and help you achieve your goals, one interval at a time.

Stay on track with your intermittent fasting schedule by utilizing TimerLabs' intuitive features. Set customized intervals for eating and fasting, and let the timer keep you accountable. Whether you're following a specific fasting protocol or experimenting with different schedules, TimerLabs ensures you maintain consistency and adherence.

Unlock your flow state every day with TimerLabs. By setting precise intervals for focused work or deep concentration, you can enter a state of heightened productivity and creativity. Whether you're working from home, tackling projects at the office, or pushing your limits at the gym, TimerLabs keeps you in the zone and optimizes your performance.

Versatile and adaptable, TimerLabs is suitable for any session-based work, regardless of your location. Whether you're at home, in the office, or in the gym, this compact and user-friendly timer is your perfect companion. Elevate your workouts, enhance your fasting routine, and boost your productivity with TimerLabs by your side.