https://graemestewart.com/blogTraining science for endurance coaches and athletes.en-gbhttps://graemestewart.com/blog/platform-update-2026-11-13https://graemestewart.com/blog/platform-update-2026-11-13Fri, 13 Nov 2026 09:00:00 +0000Daily Fuel, workout analysis, HRV history and TrainingPeaks history import arrive in Endurance Signals, plus chart zoom and a round of fixes.https://graemestewart.com/blog/why-your-vo2-max-is-differenthttps://graemestewart.com/blog/why-your-vo2-max-is-differentThu, 12 Nov 2026 09:00:00 +0000The same athlete can get VO2 max values 10 ml/kg/min apart depending on the test, the equipment and the equation. Part 1 of 3 on what the number can and cannot tell you.https://graemestewart.com/blog/why-i-built-endurance-signalshttps://graemestewart.com/blog/why-i-built-endurance-signalsWed, 11 Nov 2026 09:00:00 +0000A biochemist, former pro triathlete and club head coach on why he built a coaching platform where the numbers are computed in code, AI explains them, and the coach decides.https://graemestewart.com/blog/metabolic-profile-without-a-labhttps://graemestewart.com/blog/metabolic-profile-without-a-labWed, 11 Nov 2026 09:00:00 +0000How a 20-second sprint and a 5-minute all-out effort can estimate VO2max, VLamax, LT1 and LT2, and why that makes metabolic profiling repeatable for every athlete.https://graemestewart.com/blog/hrv-guided-training-blockshttps://graemestewart.com/blog/hrv-guided-training-blocksWed, 11 Nov 2026 09:00:00 +0000A coach's guide to HRV-guided training: measuring LnRMSSD, building a personal normal range, reading the 7-day trend, and deciding when to push or back off.