Alejandro Javaloyes

Elite XCO cyclists exhibit distinct power profiles, with notable declines due to fatigue, particularly in short efforts (<1 min) Our last paper just got published in Scandinavian Journal Of Medicine & Science in Sports: onlinelibrary.wiley.com/doi/10.1111/sm…

Published! tandfonline.com/doi/full/10.10…

Your phone camera can measure HRV. Your Polar H10 can show real-time ECG with arrhythmia detection. That's DeepHRV — and it's just getting started. Sign up for release updates (no spam, ever): deepmetric.fit/newsletter

Just pulled my last 90 days of HRV data from my Garmin (wrist) data vs my 2 min morning HRV test with a heart rate strap. Not even directionally accurate... r = -0.13 ! Stop being lazy. Wear the damn strap.

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What separates elite junior cyclists from the rest? Our new research reveals that international-level riders sustain power far better under fatigue — a decisive factor for future success. Normative benchmarks included to support talent identification and coaching decisions.

APPLIED SCIENCES SPECIAL ISSUE. Innovative Wearable Sensors for Health Performance Evaluation mdpi.com/si/271711 #mdpiapplsci a través de @Applsci

🚀 New editorial published in the EJHM — “Acronym inflation in sport science: are we naming progress or renaming it?” I reflect on the accelerating rise of acronyms in our field and question whether they signal real innovation or simply rebranding. 👉🏻 eurjhm.com/index.php/eurj…

International-level junior cyclists demonstrate superior durability, with lower power decay than national-level peers, providing normative data from an exceptionally high-level sample in the current focus category.

🎉 New paper accepted! 🔍 International-level junior cyclists show superior durability (lower power decay) compared to national-level peers. German Journal of Exercise and Sport Research 📊Field-based data | Real competition demands #SportsScience #CyclingPerformance #Durability

Development update on my HRV mobile app. Comparison between PPG-based HRV (smartphone camera) and ECG using Polar H10.

Algo muy difícil de digerir y cruel después de todo lo invertido en la pretemporada para llegar a punto al principio de año a tan solo 3 días de arrancar. Desde aquí hago un llamamiento si algún equipo está interesado. Actitud y ganas no me faltan. Gracias. 🫂

We built an automation that connects to @intervalsicu via API and sends a daily HRV-based readiness report to the coach on Telegram. It helps spot abnormal values early and act fast. Want to implement this alert system? DM me.

INSCRIPCIÓN ABIERTA: universite.umh.es/formate/inscri… Curso de Formación en Data Science Aplicada al Ciclismo.

NEW PAPER 📝 PUBLISHED! Pacing Strategy and Workload Distribution as Determinants... : The Journal of Strength & Conditioning Research journals.lww.com/nsca-jscr/abst…

Here's an example of "parasympathetic saturation", highlighting an important limitation of supine (or sleeping) HRV. When HR is <55 bpm, HRV often decreases, despite high parasympathetic activity. Thus, HRV becomes an invalid marker of parasympathetic control. In the example below, RMSSD is 25 ms higher in the standing position despite a higher HR and the well-established vagal withdrawal induced by orthostatic stress. This explains many (not all) cases of low HR with low HRV among fit individuals. To overcome this issue, and due to its superior sensitivity to stress/fatigue, HRV is best measured after waking in the standing position, IMO.

No es país para jóvenes En España, los ingresos y la posición económica de los jóvenes han caído mientras los de los mayores han mejorado con claridad. El resultado es la mayor brecha generacional de la Europa avanzada Por @pablogguz_ ¡en @nadaesgratis! nadaesgratis.es/admin/no-es-pa…

Fitbit Versa 4 vs ECG. Looks like another case of unreported heteroscedasticity (greater error with increasing HRV, as shown with my added lines). Also note that RMSSD values were <45 ms. What happens with higher values? Probably greater error. Abandon HRV from the wrist.

PUBLISHED: Vol. 14 No. 2 (2025): Special Issue of the 2025 Science & Cycling Congress | Lille - June jsc-journal.com/index.php/JSC/…