{"product_id":"whoop-4-fitness-tracker","title":"Whoop 4.0 Performance Optimisation System","description":"\u003cp\u003eThe \u003cstrong\u003eWhoop 4.0\u003c\/strong\u003e is the wearable performance system used by more professional athletes than any other wearable technology in the world — from NBA, NFL, and Premier League players to Olympic and world-champion athletes across virtually every sport. Unlike smartwatches that track activity, Whoop is designed exclusively around recovery and readiness: its proprietary algorithm analyses continuous heart rate variability, respiratory rate, skin temperature, and blood oxygen to provide a daily Recovery score and Strain recommendation that tells you precisely how hard you can train today. The subscription-based model provides the hardware free with a monthly coaching plan.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eContinuous HRV, respiratory rate, skin temperature, and SpO2 monitoring\u003c\/li\u003e\n\u003cli\u003eDaily Recovery score and Strain recommendation — how hard can you train today\u003c\/li\u003e\n\u003cli\u003eUsed by more professional athletes than any other wearable\u003c\/li\u003e\n\u003cli\u003eHardware included with monthly membership plan\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Whoop","offers":[{"title":"6-Month Membership","offer_id":57556851425612,"sku":"WHP-4-6MO","price":179.99,"currency_code":"GBP","in_stock":true},{"title":"12-Month Membership","offer_id":57556851458380,"sku":"WHP-4-12MO","price":299.99,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1056\/7247\/4956\/files\/Whoop_4.0_Performance_Optimisation_System.jpg?v=1778937006","url":"https:\/\/ybjksports.com\/products\/whoop-4-fitness-tracker","provider":"YBJK Sports","version":"1.0","type":"link"}