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.
No features have been listed yet.
Intervally - Interval Timer - Sport & Health
SocialBoat.live - A real life Fitness game
Love HIIT - Free exercise timer, share your workouts
Kickoff (formerly Kudos) - A certified personal trainer via app & text for $3 a day
HIIT Interval Buddy - Let Interval Buddy help you with your high intensity interval training - a popular method of high-impact cardio fitness training that reduces time spent in the gym and makes cardio training less of a bore.
Moov - Meet your personal coach