WHOOP shipped a new heart rate algorithm on 6 July. Two biceps tests since then, on…
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Garmin CIRQA Fail #2, Heart Rate Accuracy: Running Interval Test Result
Garmin CIRQA underestimated heart rate throughout a hot interval session on the Thames towpath. WHOOP and…
Karvonen versus %Max HR: which HR zone method should you use?
%Max HR and Karvonen can put the same runner's Zone 2 several beats apart. The maths,…
#9 The Deep Dive Fix Files: Week Ending 31 July 2026
This week's Deep Dive Fix Files covers Garmin Edge 1050 navigation, Varia radar and ClimbPro faults,…
Vertical AI Coach: Build Your Training Partner
Vertical is an adaptive AI running coach that builds your season plan, cites the sports science,…
Garmin CIRQA – First Test Accuracy Fail – Open Water Swim
Garmin CIRQA under-read heart rate by 20 to 30 bpm on its first open water swim…
Garmin CIRQA first impressions: look, feel and setup
First impressions of the Garmin CIRQA covering look, feel, setup and day-one wear. The band is…
Garmin CIRQA will change how I test sports tech
Polar SENSE reliability failures force a change on my right bicep. CIRQA fills the gap, reduces…
Runna Launches Adapt for Heat to Adjust Pace for Weather
Runna's Adapt for Heat adjusts pace targets for hot and humid running, launching alongside Strava data…
Club waivers compared: Ride with GPS vs Strava
Both platforms now collect waivers for cycling clubs. Ride with GPS allows separate waivers per event…
Suunto Run 2 confirmed, Race 3 series still a leak
The Suunto Race 3 (1.5") and Race 3 S (1.32") leak from Suunto's website. AMOLED displays,…
New York City Marathon 2026: Registration, Route & Travel Guide
Who can participate in the New York Marathon 2026?
Reps: A Recovery Score That Rewrites The Workout, Not Just The Dashboard
Reps is an iPhone and Apple Watch app that reads your recovery, sets an intensity ceiling,…
