Triathlete - The Relationship Between Age and Training Zones - Ben Greenfield
No matter how hard we train, we can’t outrun (or out-swim or out-cycle) aging. What we can do, however, is know what to expect as we age, so we can plan our training accordingly. In this case, we’re talking about training zones: heart rate and functional threshold power (FTP). Two of the most common ways to measure progress—and avoid overtraining—have different factors that cause these zones to decline over time, and we are here to explain why and what to expect.