https://xyfitaiapp.com/blog Notes on measurement, training and nutrition from the people building XYFitAI. en Sun, 06 Sep 2026 09:00:00 +0000 https://xyfitaiapp.com/blog/reading-a-noisy-scale https://xyfitaiapp.com/blog/reading-a-noisy-scale Sun, 06 Sep 2026 09:00:00 +0000 A pound of fat is about 3,500 calories. Do the arithmetic on an overnight four-pound jump and the number becomes impossible — so here is what the scale actually measured, and how to read it. measurement nutrition https://xyfitaiapp.com/blog/hyrox-chicago https://xyfitaiapp.com/blog/hyrox-chicago Sun, 06 Sep 2026 09:00:00 +0000 Eight 1 km runs, eight stations, the same race in every city on earth. Here is what HYROX Chicago actually measures, the half of it this app genuinely trains, and the half you will have to get somewhere else. hyrox training measurement