The Pelaris Locker · Field Notes & Applied Sports Science
Honest breakdowns of periodisation, body composition accuracy, concurrent training, and how AI coaching handles fatigue when life gets in the way. Every article is paired with an interactive calculator backed by our 32-source Science Hub.
Adaptive plans earn trust when they show their working. What should move a session, what shouldn't, and what to do when you disagree with the change.
Cornerstone Deep-Dives
Interactive: Return-to-Training Calculator
Adaptive plans earn trust when they show their working. What should move a session, what shouldn't, and what to do when you disagree with the change.
Lost a week or a month to illness, work or life? How to rebuild by weeks left to race day, what to skip, what to keep, and when to change your goal.
Pelaris 1.5 connects Garmin Connect both ways, rebuilds Today around your morning check-in and finished sessions, and opens the Pelaris Partner Programme.
Pelaris now reads FIT files. Drop in your sessions from Garmin, COROS, Suunto, Wahoo or Polar and your coach starts from everything you have done.
Want a workout plan from ChatGPT, Claude, Grok, Gemini or Le Chat that actually remembers your training? Here's how to connect a real coach to each one.
Arch to Arc, Badwater 135, Tor des Geants, Marathon des Sables and Norseman: what each asks of the body, and the lessons you can take into ordinary training.
Pelaris 1.4 First Light: a guided first day, plans that stay live, two programs, seasons, a one-switch coach, share cards and a bigger Body Scan.
The Channel, an Ironman, a 100-mile trail race. What each one asks of the body, and why the sensible way in is slow, checked by a doctor and built over years.
Does cardio kill your gains? A 43-study review says mostly no, with one catch for power. How to lift and run in the same week without losing either.
Playing footy, rugby or soccer and training for a marathon is doable. How I would split the week so your speed, your legs and your long runs all survive.
Pelaris, the AI fitness coach, is now on the App Store in all 27 EU countries and more than 170 countries and regions, plus Google Play and the web.
Pelaris 1.2.0 ships Apple Health and Health Connect, Hevy and Strong import, a streaming coach with memory, a rest timer, and plans for every athlete.
Pelaris now ships as an iOS app, an Android app, and a ChatGPT plugin. Same account, same program, three new ways to reach your AI coach.
A walkthrough of how Pelaris turns your goals, schedule, and logged sessions into a living training program, and why the loop matters more than the plan.
Body scanners compared: AI photo scans, DEXA, InBody and tape. What each measures, how accurate independent studies found them, and which to use.
A plateau is an information problem, not an effort problem. Here is how an AI workout tracker reads your data and adapts where a passive log only records.
Program creation that reads what you write, a draft you approve before it goes live, and the wins you earned finally on screen. Here's what shipped.
What shipped after Bedrock: a streaming coach that knows your name, and onboarding through Claude or ChatGPT, with your program built in Pelaris.
ChatGPT, Claude, and Gemini can build structured training blocks. Here is what they cannot see, and why that gap matters for triathletes.
Most AI fitness coaches either say too much or default to generic phrases. Here is what calibrated in-workout coaching sounds like, and how to recognise it.
A complete guide to plyometric training: how NFL, EPL, NBA, and tennis pros use plyos to build power, prevent injury, and unlock performance.
What shipped after Moonshot. A tool-using coach, session tracking that respects the basics, a personalised training library, and automated quality evaluation.
A complete overhaul of how Pelaris creates training programs, from a faster intake to AI-first streaming generation that watches your coach think in real time.
Unstructured multisport training produces inconsistent results. Here's what the science says about tracking load, recovery, and adaptation across disciplines.
Outcome metrics tell you what happened. Process metrics tell you why. Shifting how you track changes what you train for and how long you last.
More swim volume without fixing stroke mechanics produces diminishing returns. The biomechanics explain why technique comes first.
Obstacle races, cold plunges, ultra-marathons. People with easy lives are paying to suffer. The science explains why the instinct is correct.
Concurrent training blunts strength and endurance gains simultaneously. The fix isn't less lifting, it's smarter sequencing.
Zone 2 has real physiological support, but the studies underpinning the hype were done on elite athletes with 15-20 hours per week to train.
Most endurance athletes return feeling fine and promptly get injured. The cause is a chronic load drop that makes the plan far more aggressive than it looks.
Intermediate athletes plateau not from lack of effort but from following programs built for someone else's physiology and recovery capacity.
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