SelfLoops HRV vs zimetrix

SELFLOOPS HRV – Recovery, Readiness & Performance SELFLOOPS HRV is a professional-grade app to measure and analyze heart rate variability (HRV)—trusted by pro athletes, coaches, and researchers to track recovery, stress, fatigue, and training readiness. Using precise beat-to-beat (R-R interval) data from Bluetooth heart rate monitors, SELFLOOPS delivers highly accurate HRV insights used in sports science and performance optimization. Why track HRV? Heart Rate Variability (HRV) measures the variation between heartbeats and is one of the most reliable indicators of: 1. Recovery status 2. Training readiness 3. Stress and fatigue 4. Nervous system balance 5. Long-term performance Track your HRV daily to understand when to push harder or recover, reduce the risk of overtraining, and improve performance over time. Advanced HRV Analysis SELFLOOPS HRV provides the key metrics used in elite sports and scientific research: 1. RMSSD 2. ln(RMSSD) (HRV Score) 3. SDNN 4. pNN50 5. AVNN Key Features 1. Accurate HRV measurement from beat-to-beat data 2. Daily recovery & readiness tracking 3. Clear trends to monitor progress over time 4. Fast, simple, and intuitive interface 5. Compatible with leading Bluetooth heart rate monitors 6. Used in endurance, strength training, cycling, running, and fitness Device Compatibility Requires a Bluetooth Low Energy (BLE) heart rate monitor. For best accuracy, use a chest strap that supports R-R interval data. Not all heart rate monitors provide this data. Connection Tips If your sensor does not connect: 1. Make sure it is not connected to another app or device 2. Do not pair it directly in iOS Settings Disclaimer SELFLOOPS HRV is not a medical app and does not provide medical advice. Consult a qualified healthcare professional for any health-related decisions.

Zimetrix turns any bar, rack, ring or floor into a strength lab. It is a smart isometric dynamometer the size of a remote that, together with this app, shows you your real strength in kilograms after every session. What gets measured gets improved. Stop programming loads from a 1RM you estimated three months ago and start training with real data from this week. HOW IT WORKS 1. Anchor the device to any fixed point (bar, rack, ring, strap or floor). Under 30 seconds. 2. Pull or push at 100% for a 5-second isometric test. 3. Analyze your results instantly in the app. WHAT IT MEASURES • Max force in kg, clinical-grade precision • RFD (explosiveness): how much force you produce in 100, 200 and 300 ms • Force-time curve for every rep • Bilateral symmetry: left vs right difference, in % • Isometric endurance: how long you hold near your max WORKS WITH 30+ TESTS Deadlift, squat, bench press, row, overhead press, pull-ups, curls, hand grip, rotators and many more. WHO IT IS FOR • Serious athletes: catch plateaus and asymmetries before you lose months (or get injured). • Trainers and coaches: back every decision with objective data and track your athletes. • Physiotherapy and rehab: quantify side-to-side deficits and progress. THE APP • Pair with the device in 2 seconds by scanning a QR code • Every measurement saved forever and synced to the cloud • Unlimited history and clean charts of real, not estimated, progress • Compare by session, by side and over time • Available in English, Spanish and Catalan • Sign in with Apple or Google Three minutes per session. Data that used to require a high-performance lab. Use it once a week like a scale, but for real strength, power and explosiveness. Note: Zimetrix requires the Zimetrix dynamometer device to take measurements. Usage terms (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/