About HRV4Training
The first scientifically validated Heart Rate Variability (HRV) app. HRV4Training provides HRV based insights to help you quantify stress, better balance training and lifestyle, and improve performance. HRV4Training does...
The first scientifically validated Heart Rate Variability (HRV) app. HRV4Training provides HRV based insights to help you quantify stress, better balance training and lifestyle, and improve performance. HRV4Training does not require a heart rate monitor, since it can accurately assess your HRV using the phone's camera. HRV4Training also works with Apple Watch, the Oura ring and all compatible Bluetooth SMART sensors. HRV4Training is also the first app that goes beyond simple measurements and provides insights on: 1) acute or day to day HRV changes in response to different stressors (alcohol, travel, sick days, training, menstruation, etc.) 2) long term multi-parameter trends to look at the big picture 3) correlations between physiological measurements and annotations 4) training load analysis, fitness, fatigue, readiness to perform and injury risk 5) VO2max estimation for runners linking the app to Strava or TrainingPeaks and using a heart rate monitor during their workouts 6) Training Polarization analysis (or 80/20) 7) Lactate Threshold Estimation for runners linking the app to Strava or TrainingPeaks and using a heart rate monitor during their workouts 8) Weekly and monthly summaries to track progress. All data is processed inside the app in order to provide you with actionable interpretations that can help optimizing your training plan and performance. Supported devices for the camera measurement: iPhones 5, 5S, 6, 6S, 6+, 6S+, SE, 7, 7+, 8, 8+, X, XS, XS Max, XR, 11, 11 Pro, 11 Pro Max, 12 mini, 12, 12 Pro, 12 Pro Max, 13 mini, 13, 13 Pro, 13 Pro Max, 14, 14 Plus, 14 Max, 14 Pro, 15, 15 Max, 15 Pro, 16, 16 Max, 16 Pro Currently unsupported devices for the camera measurement: iPhones 4S, iPads and iPods - These devices require a chest strap. Other features: - HRV-based advice helps you to adapt your trainings based on objective measures of recovery - TAGS: lets you tag your sleep, mental energy, muscle fatigue, stress and all other parameters that can help you understand what is influencing your physical condition and physiological stress - Works with Bluetooth SMART heart rate monitors (a Polar H7 is recommended) or simply your phone's Camera - Integrates with the Health app (writes heart rate, and sleep, read sleep time) - Configurable test (single or orthostatic, choose test duration between 1, 3 or 5 minutes) - Extracts and stores the following features while lying down and/or standing: heart rate, mean of beat-to-beat intervals (AVNN), standard deviation of beat-to-beat intervals (SDNN), square root of the mean squared difference of successive R-Rs (rMSSD), number of pairs of successive R-Rs that differ by more than 50 ms (pNN50), low frequency power (LF, 0.04-0.15 Hz), high frequency power (HF, 0.15-0.40 Hz) - Shows the PPG signal view to ensure signal quality during the test if the camera is used instead of a bluetooth SMART sensor - HRV4T Recovery Points to provide a single, straightforward metric to analyze your physical condition - Population summaries and people like you comparisons to put your data into perspective - Analysis of compliance and consistency - Data export via email or Dropbox - Integrates with TrainingPeaks, Oura, Strava and Coros HRV4Training requires to register an account with your email address, so that your data can be backed up safely and retrieved in case anything happens (app issue, changing phone, etc.). HRV4Training does not provide medical advice. It is intended for informational purposes only. Consult a medical professional before making health or lifestyle decisions. Please find an overview of the relevant scientific literature in our guide, here: https://marcoaltini.substack.com/p/the-ultimate-guide-to-heart-rate
Version History Minor fixes. You can find additional articles and resources, here: https://marcoaltini.substack.com --- If you like the updates, please take a few minutes to the review the app. It makes a difference. Thanks! For any issues, or quick questions contact:
[email protected] p.s. let us know if you'd like to experiment more. Happy to send you Camera HRV for free. Cheers, Marco & Ale 8.6.3 May 25 Minor fixes. You can find additional articles and resources, here: https://marcoaltini.substack.com --- If you like the updates, please take a few minutes to the review the app. It makes a difference. Thanks! For any issues, or quick questions contact:
[email protected] p.s. let us know if you'd like to experiment more. Happy to send you Camera HRV for free. Cheers, Marco & Ale 8.6.0 Feb 28 Minor fixes. You can find additional articles and resources, here: https://marcoaltini.substack.com --- If you like the updates, please take a few minutes to the review the app. It makes a difference. Thanks! For any issues, or quick questions contact:
[email protected] p.s. let us know if you'd like to experiment more. Happy to send you Camera HRV for free. Cheers, Marco & Ale 8.5.9 12/20/2025 Minor fixes. You can find additional articles and resources, here: https://marcoaltini.substack.com --- If you like the updates, please take a few minutes to the review the app. It makes a difference. Thanks! For any issues, or quick questions contact:
[email protected] p.s. let us know if you'd like to experiment more. Happy to send you Camera HRV for free. Cheers, Marco & Ale 8.5.8 10/29/2025 Minor fixes. You can find additional articles and resources, here: https://marcoaltini.substack.com --- If you like the updates, please take a few minutes to the review the app. It makes a difference. Thanks! For any issues, or quick questions contact:
[email protected] p.s. let us know if you'd like to experiment more. Happy to send you Camera HRV for free. Cheers, Marco & Ale 8.5.7 10/08/2025 Minor fixes. You can find additional articles and resources, here: https://marcoaltini.substack.com --- If you like the updates, please take a few minutes to the review the app. It makes a difference. Thanks! For any issues, or quick questions contact:
[email protected] p.s. let us know if you'd like to experiment more. Happy to send you Camera HRV for free. Cheers, Marco & Ale 8.5.6 09/24/2025 Minor fixes. You can find additional articles and resources, here: https://marcoaltini.substack.com --- If you like the updates, please take a few minutes to the review the app. It makes a difference. Thanks! For any issues, or quick questions contact:
[email protected] p.s. let us know if you'd like to experiment more. Happy to send you Camera HRV for free. Cheers, Marco & Ale 8.5.5 07/06/2025 Minor fixes. You can find additional articles and resources, here: https://marcoaltini.substack.com --- If you like the updates, please take a few minutes to the review the app. It makes a difference. Thanks! For any issues, or quick questions contact:
[email protected] p.s. let us know if you'd like to experiment more. Happy to send you Camera HRV for free. Cheers, Marco & Ale 8.5.4 05/22/2025 Minor fixes. You can find additional articles and resources, here: https://marcoaltini.substack.com --- If you like the updates, please take a few minutes to the review the app. It makes a difference. Thanks! For any issues, or quick questions contact:
[email protected] p.s. let us know if you'd like to experiment more. Happy to send you Camera HRV for free. Cheers, Marco & Ale 8.5.3 04/07/2025 You can find additional articles and resources, here: https://marcoaltini.substack.com --- If you like the updates, please take a few minutes to the review the app. It makes a difference. Thanks! For any issues, or quick questions contact:
[email protected] p.s. let us know if you'd like to experiment more. Happy to send you Camera HRV for free. Cheers, Marco & Ale 8.5.2 02/27/2025 check out the new HRV4Training Pro at https://hrv4training.web.app/ and use code HRV30 for 30% off you can find additional articles and resources, here: https://marcoaltini.substack.com --- If you like the updates, please take a few minutes to the review the app. It makes a difference. Thanks! For any issues, or quick questions contact:
[email protected] p.s. let us know if you'd like to experiment more. Happy to send you Camera HRV for free. Cheers, Marco & Ale 8.5.1 12/09/2024 check out the new HRV4Training Pro at https://hrv4training.web.app/ and use code HRV30 for 30% off you can find additional articles and resources, here: https://marcoaltini.substack.com --- If you like the updates, please take a few minutes to the review the app. It makes a difference. Thanks! For any issues, or quick questions contact:
[email protected] p.s. let us know if you'd like to experiment more. Happy to send you Camera HRV for free. Cheers, Marco & Ale 8.4.9 11/07/2024 check out the new HRV4Training Pro at https://hrv4training.web.app/ and use code HRV30 for 30% off --- If you like the updates, please take a few minutes to the review the app. It makes a difference. Thanks! For any issues, or quick questions contact:
[email protected] p.s. let us know if you'd like to experiment more. Happy to send you Camera HRV for free. Cheers, Marco & Ale 8.4.8 09/18/2024 minor improvements --- If you like the updates, please take a few minutes to the review the app. It makes a difference. Thanks! For any issues, or quick questions contact:
[email protected] or use @altini_marco on Twitter p.s. let us know if you'd like to experiment more. Happy to send you Camera HRV for free. Cheers, Marco & Ale 8.4.7 04/17/2024 minor improvements --- If you like the updates, please take a few minutes to the review the app. It makes a difference. Thanks! For any issues, or quick questions contact:
[email protected] or use @altini_marco on Twitter p.s. let us know if you'd like to experiment more. Happy to send you Camera HRV for free. Cheers, Marco & Ale 8.4.6 04/09/2024 minor improvements --- If you like the updates, please take a few minutes to the review the app. It makes a difference. Thanks! For any issues, or quick questions contact:
[email protected] or use @altini_marco on Twitter p.s. let us know if you'd like to experiment more. Happy to send you Camera HRV for free. Cheers, Marco & Ale 8.4.5 04/05/2024 minor improvements --- If you like the updates, please take a few minutes to the review the app. It makes a difference. Thanks! For any issues, or quick questions contact:
[email protected] or use @altini_marco on Twitter p.s. let us know if you'd like to experiment more. Happy to send you Camera HRV for free. Cheers, Marco & Ale 8.4.4 03/26/2024 minor improvements --- If you like the updates, please take a few minutes to the review the app. It makes a difference. Thanks! For any issues, or quick questions contact:
[email protected] or use @altini_marco on Twitter p.s. let us know if you'd like to experiment more. Happy to send you Camera HRV for free. Cheers, Marco & Ale 8.4.2 02/29/2024 minor improvements --- If you like the updates, please take a few minutes to the review the app. It makes a difference. Thanks! For any issues, or quick questions contact:
[email protected] or use @altini_marco on Twitter p.s. let us know if you'd like to experiment more. Happy to send you Camera HRV for free. Cheers, Marco & Ale 8.4.1 01/25/2024 * Added the option to logout from Dropbox so that you can change account (see Settings) * Resolved an issue that caused the normal range not to be shown correctly under Baseline for Pro users. Try Pro here: https://hrv4training.web.app --- If you like the updates, please take a few minutes to the review the app. It makes a difference. Thanks! For any issues, or quick questions contact:
[email protected] or use @altini_marco on Twitter p.s. let us know if you'd like to experiment more. Happy to send you Camera HRV for free. Cheers, Marco & Ale 8.4.0 01/25/2024 * Added the option to logout from Dropbox so that you can change account (see Settings) * Resolved an issue that caused the normal range not to be shown correctly under Baseline for Pro users. Try Pro here: https://hrv4training.web.app/ and use code HRV24 for 24% off until end of the week --- If you like the updates, please take a few minutes to the review the app. It makes a difference. Thanks! For any issues, or quick questions contact:
[email protected] or use @altini_marco on Twitter p.s. let us know if you'd like to experiment more. Happy to send you Camera HRV for free. Cheers, Marco & Ale 8.3.9 01/06/2024 * All users can now migrate to the new HRV4Training Pro. Please see how, here: https://marcoaltini.substack.com/p/hrv4training-pro-user-guide and use code SCIENCE for 20% off --- If you like the updates, please take a few minutes to the review the app. It makes a difference. Thanks! For any issues, or quick questions contact:
[email protected] or use @altini_marco on Twitter p.s. let us know if you'd like to experiment more. Happy to send you Camera HRV for free. Cheers, Marco & Ale 8.3.8 12/22/2023 * All users can now migrate to the new HRV4Training Pro. Please see how, here: https://marcoaltini.substack.com/p/hrv4training-pro-user-guide and use code SCIENCE for 20% off --- If you like the updates, please take a few minutes to the review the app. It makes a difference. Thanks! For any issues, or quick questions contact:
[email protected] or use @altini_marco on Twitter p.s. let us know if you'd like to experiment more. Happy to send you Camera HRV for free. Cheers, Marco & Ale 8.3.7 12/20/2023 * All users can now migrate to the new HRV4Training Pro. Please see how, here: https://marcoaltini.substack.com/p/hrv4training-pro-user-guide and use code SCIENCE for 20% off --- If you like the updates, please take a few minutes to the review the app. It makes a difference. Thanks! For any issues, or quick questions contact:
[email protected] or use @altini_marco on Twitter p.s. let us know if you'd like to experiment more. Happy to send you Camera HRV for free. Cheers, Marco & Ale 8.3.6 12/19/2023 * All users can now migrate to the new HRV4Training Pro. Please see how, here: https://marcoaltini.substack.com/p/hrv4training-pro-user-guide and use code SCIENCE for 20% off --- If you like the updates, please take a few minutes to the review the app. It makes a difference. Thanks! For any issues, or quick questions contact:
[email protected] or use @altini_marco on Twitter p.s. let us know if you'd like to experiment more. Happy to send you Camera HRV for free. Cheers, Marco & Ale 8.3.5 12/15/2023
