{"product_id":"fourth-frontier-x2-chest-strap-ecg-heart-rate-monitor-2026548900","title":"Fourth Frontier X2 Chest Strap ECG Heart Rate Monitor","description":"\u003cp\u003e\u003cstrong\u003eSmartech Fourth Frontier X2\u003c\/strong\u003e The Frontier X2 is a chest-strap wearable combining continuous ECG-based heart monitoring with highly accurate performance tracking. Designed for comfort and precision, it delivers deeper insights into stress, recovery, heart rate variability, and physiological load.\u003c\/p\u003e\u003cp\u003eThe Frontier X2 is a chest-strap wearable that combines continuous ECG-based heart monitoring with highly accurate performance tracking. Designed for those who want deeper insight into both fitness and heart health, it captures richer cardiovascular and physiological data throughout the day.\u003c\/p\u003e\u003cp\u003eBuilt for comfort and long-term wearability, the Frontier X2 helps you understand how your body responds to training, stress, and recovery. As a chest-based monitor, it offers accuracy widely regarded as the gold standard in heart-rate tracking, delivering more consistent readings than typical wrist-based wearables.\u003c\/p\u003e\u003cp\u003eIt tracks key indicators including heart rate, ECG, heart rate variability (HRV), stress response, recovery patterns, and physiological load, reflecting the overall strain placed on the body through daily activity.\u003c\/p\u003e\u003cp\u003eWith a clearer view of cardiovascular function and body readiness, the Frontier X2 supports smarter decisions around training intensity, recovery, and lifestyle, offering a more advanced and data-driven approach to wearable monitoring.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eKey Features \u0026amp; Benefits\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eContinuous ECG-based monitoring for deeper cardiovascular insight\u003c\/li\u003e\n\u003cli\u003eChest-strap design delivering gold-standard accuracy and consistent data capture\u003c\/li\u003e\n\u003cli\u003eAdvanced HRV-based insights supporting VO max estimation and readiness tracking\u003c\/li\u003e\n\u003cli\u003eOn-device vibration alerts based on heart rate, breathing rate, and strain to help prevent overexertion\u003c\/li\u003e\n\u003cli\u003eSupports precise Zone 2 training and threshold-based guidance (VT1)\u003c\/li\u003e\n\u003cli\u003ePhone-free workout recording - start sessions directly from the device and sync later via the app\u003c\/li\u003e\n\u003cli\u003eDesigned for all-day comfort with a secure, lightweight fit\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"selfridges","offers":[{"title":"Default Title","offer_id":49421702889710,"sku":"STO-ITEM-2026-548900","price":527.99,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0522\/0125\/9183\/files\/R04619553_BLUEBLACK_M.jpg?v=1786806667","url":"https:\/\/mcgrocer.com\/products\/fourth-frontier-x2-chest-strap-ecg-heart-rate-monitor-2026548900","provider":"McGrocer","version":"1.0","type":"link"}