Does anyone know how accurate the Polar Fitness Test is? I've measured my max HR by using the 'sit on a trainer, increasing workload every couple of minutes until you think you can't do any more, then sprint' methodology. My max HR recorded was 190, which they say should be close to you actual maximum. The other night I tried the fitness test on my S410 for the first time. The results I got were max HR = 196 and OwnIndex = 62. Funnily enough I happen to be 24, meaning that according to Polar, my max HR fits the 220 - age formula. Is this purely coincidence? Has anyone compared the Polar test to actual lab testing?