{"niche":"专业运动员推荐哪些具备心率监测和训练分析等高级功能的 GPS 手表？","description":"What are the recommended GPS watches for professional athletes with advanced features like heart rate monitors and training analytics?","products":[{"brand":"Polar","model":"Grit X2 Pro","price_gbp":746.88,"origin_country":null,"specs":{"weight":"2.8 oz","screen_size":"1.39 in","battery_life":"Performance training mode: 43 h; Eco training mode: 140 h; Smartwatch mode: 10 d","gps_accuracy":"Dual-frequency GPS (improved antenna; high accuracy)","water_resistance":"WR100","heart_rate_monitor":"Optical Heart Rate (OHR) Gen 4; Wrist-ECG"},"confidence_score":null,"sources":[{"label":"First Class Watches","url":"https://us.firstclasswatches.com/polar-grit-x2-pro-premium-gps-smart-sports-watch-with-black-silicone-black-yarn-hook-loop-straps-900113027-p-168474/","currency":"USD","source_country":"US","price":999.0,"price_gbp":746.88,"scraped_at":"2026-06-12T11:53:06.505156"}],"summary":"The Polar Grit X2 Pro is a premium outdoor multisport watch with a sapphire AMOLED display, dual-frequency GPS, extensive biosensing (OHR Gen 4, wrist-ECG, SpO2), and advanced training/recovery tools. It targets endurance athletes and outdoor adventurers needing robust navigation, long battery life, and detailed physiological metrics.","ideal_for":"适合需要高级训练分析和准确生理数据的职业运动员，因为它提供 dual-frequency GPS、OHR Gen 4 加上 wrist-ECG，并在 GPS 训练模式下拥有最长可达 43 h 的电池续航。"}]}