Blog post by Marco Altini In this post I cover best practices and provide some additional guidelines around the camera-based measurement in HRV4Training. In the second part of this post, we provide general guidelines that apply regardless of your measurement setup. HRV4Training's unique camera based measurement was scientifically validated and showed to be equivalent to chest strap measurements (Polar H7) as well as electrocardiography (find out more here). On Android, fragmentation might cause issues. While we cannot test all devices and guarantee accuracy on the different Android phones, cameras and operating system versions, we developed methods to detect possible issues with your specific setup and inform you, so that you can take action. Please read below for some additional information regarding measuring with the camera on Android and check out this post for our validation on Android. Camera guidelinesMake sure to follow these guidelines for all your measurements:
As first time users, try to take 2-3 measurements following the advice above, and you should be able to acquire high quality data rather easily. Try to make sure the data quality is labeled as "optimal" by the app, and repeat the measurement otherwise. If you experience additional issues, feel free to contact us. You can try the camera measurement anytime from Menu / Resources / Camera measurement practice mode. The app provides the following signal quality categories:
Additional notes on Android measurementsFirst of all, make sure that HRV4Training is allowed to access your camera. Android apps need permission to access the camera, you can enable the app from Settings / Apps / HRV4Training, Permissions, as shown below: As mentioned above, while we cannot test all devices and guarantee accuracy on the different Android phones, cameras and operating system versions, we developed methods to detect possible issues with your specific setup and inform you, so that you can take action. In particular, during the Practice mode as well as during each measurement, we check that the camera is providing frames at the required frequency and with very limited variations, which is key to provide accurate data. If your phone is unable to sustain the required frequency or lags some frames, we can detect it and inform you, as shown below. Sometimes terminating other apps or making sure that there are no other time consuming processes going on in the background can be sufficient to obtain a good reading. You can also try to force stop HRV4Training and launch it again. However, if the problem keeps showing up at each measurement, it could be that simply your setup does not work with this sensor modality. In this case, we recommend using a Bluetooth SMART sensor, for example a Polar H7. If you do not plan to use HRV4Training using a chest strap, you can always get refund on the Google Play Store. General guidelines (camera or chest strap)Here are a few other points that are relevant regardless of the sensor modality you use (camera or Bluetooth low energy sensor):
1 Comment
6/10/2016 08:32:08 am
Es una excelente idea y buena herramienta para saber cómo uno está cada día
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Marco Altini, founder of HRV4Training Blog Index The Ultimate Guide to HRV 1: Measurement setup 2: Interpreting your data 3: Case studies and practical examples How To 1. Intro to HRV 2. How to use HRV, the basics 3. HRV guided training 4. HRV and training load 5. HRV, strength & power 6. Overview in HRV4Training Pro 7. HRV in team sports HRV Measurements Best Practices 1. Context & Time of the Day 2. Duration 3. Paced breathing 4. Orthostatic Test 5. Slides HRV overview 6. Normal values and historical data 7. HRV features Data Analysis 1a. Acute Changes in HRV (individual level) 1b. Acute Changes in HRV (population level) 1c. Acute Changes in HRV & measurement consistency 1d. Acute Changes in HRV in endurance and power sports 2a. Interpreting HRV Trends 2b. HRV Baseline Trends & CV 3. Tags & Correlations 4. Ectopic beats & motion artifacts 5. HRV4Training Insights 6. HRV4Training & Sports Science 7. HRV & fitness / training load 8. HRV & performance 9. VO2max models 10. Repeated HRV measurements 11. VO2max and performance 12. HR, HRV and performance 13. Training intensity & performance 14. Publication: VO2max & running performance 15. Estimating running performance 16. Coefficient of Variation 17. More on CV and the big picture 18. Case study marathon training 19. Case study injury and lifestyle stress 20. HRV and menstrual cycle 21. Cardiac decoupling 22. FTP, lactate threshold, half and full marathon time estimates 23. Training Monotony Camera & Sensors 1. ECG vs Polar & Mio Alpha 2a. Camera vs Polar 2b. Camera vs Polar iOS10 2c. iPhone 7+ vs Polar 2d. Comparison of PPG sensors 3. Camera measurement guidelines 4. Validation paper 5. Android camera vs Chest strap 6. Scosche Rhythm24 7. Apple Watch 8. CorSense 9. Samsung Galaxy App Features 1. Features and Recovery Points 2. Daily advice 3. HRV4Training insights 4. Sleep tracking 5. Training load analysis 6a. Integration with Strava 6b. Integration with TrainingPeaks 6c. Integration with SportTracks 6d. Integration with Genetrainer 6e. Integration with Apple Health 6f. Integration with Todays Plan 7. Acute HRV changes by sport 8. Remote tags in HRV4T Coach 9. VO2max Estimation 10. Acute stressors analysis 11. Training Polarization 12. Lactate Threshold Estimation 13. Functional Threshold Power(FTP) Estimation for cyclists 14. Aerobic Endurance analysis 15. Intervals Analysis 16. Training Planning 17. Integration with Oura 18. Aerobic efficiency and cardiac decoupling Other 1. HRV normal values 2. HRV normalization by HR 3. HRV 101 |