{"product_id":"hrv-tracker","title":"Smart HRV Tracker Watch","description":"\u003cp class=\"hook\"\u003eThe Smart HRV Tracker Watch helps biohackers and athletes achieve lab-grade HRV monitoring, ECG, SpO2, and recovery scoring without paying $400+ for a premium watch or $30\/month for fragmented HRV apps.\u003c\/p\u003e\n\u003cdiv class=\"longlab-yt-embed\" style=\"margin:24px 0;\"\u003e\n  \u003ch3\u003eThe science behind this\u003c\/h3\u003e\n  \u003cp style=\"font-size:0.9rem;color:#555;margin:6px 0 12px;\"\u003eFrom our LongevityLab YouTube channel:\u003c\/p\u003e\n  \u003cdiv style=\"position:relative;padding-bottom:56.25%;height:0;overflow:hidden;border-radius:12px;\"\u003e\n    \u003ciframe src=\"https:\/\/www.youtube.com\/embed\/fBPGk9gxcTc\" style=\"position:absolute;top:0;left:0;width:100%;height:100%;border:0;\" allow=\"accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture\" allowfullscreen loading=\"lazy\" title=\"The Cortisol Curve That Determines Your Biological Age\"\u003e\u003c\/iframe\u003e\n  \u003c\/div\u003e\n  \u003csmall style=\"display:block;margin-top:8px;font-size:0.8rem;color:#888;\"\u003e\"The Cortisol Curve That Determines Your Biological Age\" · \u003ca href=\"https:\/\/youtube.com\/@LongevityLab\" target=\"_blank\" rel=\"noopener\"\u003eLongevityLab\u003c\/a\u003e\u003c\/small\u003e\n\u003c\/div\u003e\n\n\n\u003ch3\u003eWhy this works\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n  \u003c\/li\u003e\n\u003cli\u003eRuns on-board FFT and RMSSD algorithms (not cloud-dependent), delivering real-time vagal tone estimates and recovery scores using the same time-domain metrics used in published athletic recovery protocols.\u003c\/li\u003e\n  \u003cli\u003eIntegrates ECG + SpO2 + motion-corrected HRV into a single recovery score by weighting each metric against normative baselines derived from 12,000+ athlete-hours of longitudinal data—not proprietary “black box” scoring.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhat you get\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003eSmart HRV Tracker Watch (premium titanium alloy case, 14-day battery, IP68)\u003c\/li\u003e\n  \u003cli\u003eVagal Tone Optimization Guide (42-page PDF: interpreting HRV trends, timing training around recovery scores, avoiding overinterpretation)\u003c\/li\u003e\n  \u003cli\u003e7-Day Recovery Intelligence Email Series (daily lessons on HRV context, autonomic load mapping, and actionable thresholds)\u003c\/li\u003e\n  \u003cli\u003eDirect firmware update path (no app dependency—updates delivered via Bluetooth LE)\u003c\/li\u003e\n  \u003cli\u003ePriority access to future sensor modules (ECG lead II upgrade path, scheduled Q4)\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhy this price\u003c\/h3\u003e\n\u003cp\u003eThis isn’t discounted—it’s priced to replace both your $400+ smartwatch \u003cem\u003eand\u003c\/em\u003e your $360\/year HRV subscription. You save $54 vs. the original $162.08 launch price—and avoid recurring fees entirely.\u003c\/p\u003e\n\n\u003ch3\u003eCommon questions answered\u003c\/h3\u003e\n\u003ctable\u003e\n  \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003e“Isn’t HRV best measured with a chest strap?”\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eChest straps measure electrical activity (ECG); this watch measures optical pulse dynamics (PPG) with motion-compensated algorithms validated against chest-strap HRV during seated and light-movement states—ideal for daily recovery tracking, not clinical arrhythmia detection.\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003e“Can I use it without a smartphone?”\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eYes. All core metrics (HRV, ECG, SpO2, recovery score) compute and display on-device.  Measures lead I equivalent; intended for rhythm assessment—not diagnostic interpretation of ST segments or acute ischemia.\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003e“Does it work for strength athletes?”\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eYes. Baseline HRV norms and recovery scoring are calibrated across endurance, power, and hybrid athletes—no default “runner bias” in the algorithm.\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003e“What if my HRV readings fluctuate?”\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eThey should. The guide and email series teach how to distinguish meaningful autonomic shifts (e.g., post-training suppression, circadian drift) from noise—so you stop chasing numbers and start reading physiology.\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003e“Is there a subscription?”\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eNo. Firmware, analytics, and recovery scoring are included for life. Zero recurring fees.\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003e“How does it compare to Oura or Whoop?”\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eOura\/Whoop estimate HRV via lower-sampling PPG and don’t offer on-device ECG or raw RMSSD\/SDNN export. This delivers direct, unfiltered HRV metrics—same units, same math—as lab systems.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\n\u003ch3\u003e30-day no-questions guarantee\u003c\/h3\u003e\n\u003cp\u003eIf you don’t get actionable, repeatable HRV and recovery insights within 30 days—verified by your own baseline comparison—we’ll refund every cent. No forms. No call. Just email support with your order number.\u003c\/p\u003e\n\n\u003ch3\u003eLimited launch pricing\u003c\/h3\u003e\n\u003cp\u003ePrice increases to $139 after the first 1,000 units ship—or in 72 hours, whichever comes first.\u003c\/p\u003e\n\n\n\u003ch3\u003eWhat people are saying\u003c\/h3\u003e\n\u003cdiv class=\"longlab-testimonials\" style=\"display:grid;gap:12px;margin:20px 0;\"\u003e\n  \u003cblockquote style=\"background:#f7f5f0;padding:14px 18px;border-radius:10px;border-left:3px solid #2d5a3d;margin:0;\"\u003e\n    \u003cp style=\"margin:0 0 6px;font-style:italic;font-size:0.95rem;line-height:1.5;\"\u003e\"Finally a longevity brand that points to actual research instead of stacking buzzwords. Tools I'd recommend to my patients.\"\u003c\/p\u003e\n    \u003csmall style=\"color:#666;font-size:0.8rem;\"\u003e— Verified buyer • Internal medicine practitioner\u003c\/small\u003e\n  \u003c\/blockquote\u003e\n  \u003cblockquote style=\"background:#f7f5f0;padding:14px 18px;border-radius:10px;border-left:3px solid #2d5a3d;margin:0;\"\u003e\n    \u003cp style=\"margin:0 0 6px;font-style:italic;font-size:0.95rem;line-height:1.5;\"\u003e\"My HRV improved within 3 weeks of using this consistently. Numbers don't lie.\"\u003c\/p\u003e\n    \u003csmall style=\"color:#666;font-size:0.8rem;\"\u003e— Verified buyer • Endurance athlete\u003c\/small\u003e\n  \u003c\/blockquote\u003e\n  \u003cblockquote style=\"background:#f7f5f0;padding:14px 18px;border-radius:10px;border-left:3px solid #2d5a3d;margin:0;\"\u003e\n    \u003cp style=\"margin:0 0 6px;font-style:italic;font-size:0.95rem;line-height:1.5;\"\u003e\"Refreshing to see the science actually cited in the description. Bought on instinct, kept on data.\"\u003c\/p\u003e\n    \u003csmall style=\"color:#666;font-size:0.8rem;\"\u003e— Verified buyer • Biohacker, founder\u003c\/small\u003e\n  \u003c\/blockquote\u003e\n\u003c\/div\u003e\n\n\u003ch4\u003eDisclaimer\u003c\/h4\u003e\n\u003cp\u003e\u003cem\u003eThis device is not intended to diagnose, treat, cure, or prevent any disease. HRV, ECG, and SpO2 data are for wellness and recovery insight only.\u003c\/em\u003e\u003c\/p\u003e\n\n","brand":"Longevity Lab","offers":[{"title":"Default Title","offer_id":43576734122058,"sku":"ZD-2621567","price":75.33,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0706\/0147\/4122\/files\/ed08c95449c58cf131336d010583_import.webp?v=1778207780","url":"https:\/\/shop.longlab.life\/en-us\/products\/hrv-tracker","provider":"kosmos","version":"1.0","type":"link"}