1. Continuous Respiratory Rate Monitoring to Detect Clinical Deteriorations using Wearable Sensors
Peter H. Charlton. PdD. Thesis, June 2017
2. Breathing Rate Estimation From the Electrocardiogram and Photoplethysmogram: A Review
Article in IEEE Reviews in Biomedical Engineering · October 2017, Peter H. Charlton, et. al.
3. Estimation of the Respiratory Rate from Localised ECG at Different Auscultation Sites
Department of Engineering, King’s College London, London WC2R 2LS, UK, Faculté de Médecine, Université de Kindu, Kindu, Democratic Republic of the Congo
Xinqi Bao, Aimé Kingwengwe Abdala, Nlandu Kamavuako
Sensors 2021, 21(1), 78
https://www.mdpi.com/1424-8220/21/1/78/htm
The authors used an iWorx, model RA834 for this paper
4. Indirect Estimation of Breathing Rate from Heart Rate Monitoring System during Running
You can use the Polar H10 when an accuracy of more than 5.5% is not required:
https://mdpi-res.com/d_attachment/sensors/sensors-21-05651/article_deploy/sensors-21-05651-v2.pdf
Prigent, G.; Aminian, K.;
Rodrigues, T.; Vesin, J.-M.; Millet,
G.P.; Falbriard, M.; Meyer, F.;
Paraschiv-Ionescu, A.
Sensors 2021, 21, 5651
5. Breathing Rate Estimation from Head-Worn Photoplethysmography Sensor Data Using Machine Learning
Sensors 2022, 22, 2079