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heart rate

ToolBox: Understanding Heart Rate Variability

With the increased availability of usable power measuring devices, heart rate (HR) as a tool for measuring intensity may seem demoted to “option #2.” However, heart rate remains the financial and practical mainstay for most cyclists today, so it’s important to understand its strengths and limitations. One thing to keep in mind is how to deal with the potential variability in day-to-day heart rate response…