Polar Street X tested across battery life, heart rate accuracy, GPS, sleep staging, and 170+ urban…
Tag: Heart Rate Accuracy
WHOOP’s Biggest Heart Rate Algorithm Update Yet — Here’s What Changed and Why It Matters
In February 2026, WHOOP deployed its most significant heart rate algorithm revision to date. This explainer…
Apple Watch Ultra 3 Review – the bible – uber-detailed sports edition
After 100+ hours of sports testing, Apple Watch Ultra 3 earns 88/100 — a great smartwatch…
Garmin 970 vs AWU3: GPS Accuracy Deep Dive
The ultimate 4-watch GNSS showdown! A decade-long test adds the Garmin 970 and Apple Watch Ultra…
