Polar have employed someone to start creating Infographics. Not a bad thing. We all love a good picture sometimes if we are too lazy to read.
I’m not sure of the data below. I’m definately a faster runner than the only Polish person in my tri club. Sample size of 1…must be true.
We all seem to do our steady state training in Zone 3…hmmm.
Last Updated on 12 January 2026 by the5krunner
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tfk is the founder and author of the5krunner, an independent endurance sports technology publication. With 20 years of hands-on testing of GPS watches and wearables, and competing in triathlons at an international age-group level, tfk provides in-depth expert analysis of fitness technology for serious athletes and endurance sport competitors.
