Zone 2 Guardrail — ASO

By Serhii Sachuk on AppTrack Ninja.

Keep your heart in Zone 2

Train in Zone 2 without watching your wrist. Zone 2, your easy aerobic base zone, only works if you actually stay in it. Go too hard and you lose the fat-burning, endurance-building benefit. But constantly glancing at your heart rate breaks your rhythm and ruins the run, ride, or row. Zone 2 Guardrail fixes that. Set your ceiling once, start a session, and put your wrist down. The moment your heart rate climbs above your Zone 2 cap, you get a firm haptic buzz, a clear "ease off" you can feel without looking. When you settle back into zone, a gentle tap confirms you're good. Train by feel; let…

Categories: Health & Fitness, Sports

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