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12 Week Half Marathon Running Plan Based on Heart Rate
This plan is designed for 12 weeks and will guide you to your first or fastest half marathon. The plan is based on heart rate, but can easily be completed using Rate of Percieved Exertion. Focus on Zone 2 as a Conversational Pace (a pace where you can hold a conversation). Zone 3 and Zone 4 are considered Tempo and Threshold, consecutively. Zone 3, tempo pace, is a pace that can be held for an entire hour. Zone 4, threshold pace, is a pace you can hold for no longer than 30 minutes.