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Heart Rate

Stories from across the site that focus on Heart Rate.

How Josh Kerr’s Amazfit Cheetah 2 Pro Data Reveals Secrets Behind His Mile World Record

Discover how detailed split times, heart rate, and cadence data from the Amazfit Cheetah 2 Pro explain Josh Kerr's historic mile world record and what it means for runners.

Jul 23, 2026

Why Older Runners Lead in Distance and What It Means for Your Training

Explore how runners in their 50s average the longest distances, enjoy better sleep, lower heart rates, and high VO2 max, reshaping fitness assumptions.

Jul 8, 2026