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You should upgrade or use an alternative browser. If we reset fitness calibration data on Apple Watch with Tap the My Watch tab, then tap Privacy > Reset Fitness Calibration Data, does the Apple Watch re-calibrate itself subsequently with an outdoor workout.

Does the watchOS need re-installation for it to start re-calibration, or does it automatically do it with an outdoor run/ walk subsequent to a reset of calibration data.

Another question: If after a fresh installation of watchOS on Apple Watch the first workout is an indoor workout and not outdoor workout, then does the Apple Watch calibrate itself correctly if after few indoor workouts the first outdoor workout is performed. Or is it mandatory that the first workout after a fresh install of watchOS must necessarily be an outdoor workout.