Norwegian 4x4 workout — ASO

By Alice Winthrop on AppTrack Ninja.

Interval timer + HR zone guide

Focus on your effort. The app does the rest. Norwegian 4×4 is a guided interval workout that calculates your target heart-rate zone, runs the interval timer, and, with an Apple Watch or Bluetooth heart rate monitor, prompts you to stay in zone through every interval. You focus on the workout. It guides you though the protocol. The workout is simple and always the same shape: warm up (customize length), then four hard 4-minute intervals with 3 minutes recovery between them, then cool down. You always know how hard to push and how much time is left. What you get - Live zone coaching with an App…

Categories: Health & Fitness, Sports

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