Ramp4x4: VO2 Max Trainer — ASO

By Archline Labs LLC on AppTrack Ninja.

Norwegian 4x4 interval timer

Train your VO2 max with guided Norwegian 4x4 interval workouts on iPhone and Apple Watch. Four 4-minute efforts. Three-minute recoveries. Live heart-rate guidance. Ramp4x4 handles the timing and coaching so you can focus on the workout. START WITH A PLAN Choose your goal, preview a session, and set an optional reminder for your first workout. Start unlimited classic 4x4 sessions for free, or follow a guided Premium 8-week plan with two workouts per week. STAY IN YOUR TARGET ZONE See when your heart rate is below, within, or above your target. Follow interval countdowns, voice cues, and haptic…

Categories: Health & Fitness, Sports

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