{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,6,10]],"date-time":"2026-06-10T05:26:03Z","timestamp":1781069163667,"version":"3.54.1"},"reference-count":33,"publisher":"MDPI AG","issue":"16","license":[{"start":{"date-parts":[[2021,8,20]],"date-time":"2021-08-20T00:00:00Z","timestamp":1629417600000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"DOI":"10.13039\/501100004955","name":"\u00d6sterreichische Forschungsf\u00f6rderungsgesellschaft","doi-asserted-by":"publisher","award":["872574"],"award-info":[{"award-number":["872574"]}],"id":[{"id":"10.13039\/501100004955","id-type":"DOI","asserted-by":"publisher"}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Sensors"],"abstract":"<jats:p>Breathing pattern (BP) is related to key psychophysiological and performance variables during exercise. Modern wearable sensors and data analysis techniques facilitate BP analysis during running but are lacking crucial validation steps in their deployment. Thus, we sought to evaluate a wearable garment with respiratory inductance plethysmography (RIP) sensors in combination with a custom-built algorithm versus a reference spirometry system to determine its concurrent validity in detecting flow reversals (FR) and BP. Twelve runners completed an incremental running protocol to exhaustion with synchronized spirometry and RIP sensors. An algorithm was developed to filter, segment, and enrich the RIP data for FR and BP estimation. The algorithm successfully identified over 99% of FR with an average time lag of 0.018 s (\u22120.067,0.104) after the reference system. Breathing rate (BR) estimation had low mean absolute percent error (MAPE = 2.74 [0.00,5.99]), but other BP components had variable accuracy. The proposed system is valid and practically useful for applications of BP assessment in the field, especially when measuring abrupt changes in BR. More studies are needed to improve BP timing estimation and utilize abdominal RIP during running.<\/jats:p>","DOI":"10.3390\/s21165606","type":"journal-article","created":{"date-parts":[[2021,8,22]],"date-time":"2021-08-22T22:59:27Z","timestamp":1629673167000},"page":"5606","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":37,"title":["Enhanced Breathing Pattern Detection during Running Using Wearable Sensors"],"prefix":"10.3390","volume":"21","author":[{"ORCID":"https:\/\/orcid.org\/0000-0003-0113-5217","authenticated-orcid":false,"given":"Eric","family":"Harbour","sequence":"first","affiliation":[{"name":"Department of Sport and Exercise Science, University of Salzburg, Schlossallee 49, 5400 Hallein-Rif, Austria"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-7556-5984","authenticated-orcid":false,"given":"Michael","family":"Lasshofer","sequence":"additional","affiliation":[{"name":"Department of Sport and Exercise Science, University of Salzburg, Schlossallee 49, 5400 Hallein-Rif, Austria"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Matteo","family":"Genitrini","sequence":"additional","affiliation":[{"name":"Department of Sport and Exercise Science, University of Salzburg, Schlossallee 49, 5400 Hallein-Rif, Austria"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-0380-8801","authenticated-orcid":false,"given":"Hermann","family":"Schwameder","sequence":"additional","affiliation":[{"name":"Department of Sport and Exercise Science, University of Salzburg, Schlossallee 49, 5400 Hallein-Rif, Austria"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"1968","published-online":{"date-parts":[[2021,8,20]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","unstructured":"Nicol\u00f2, A., Massaroni, C., Schena, E., and Sacchetti, M. (2020). The Importance of Respiratory Rate Monitoring: From Healthcare to Sport and Exercise. Sensors, 20.","DOI":"10.3390\/s20216396"},{"key":"ref_2","doi-asserted-by":"crossref","first-page":"922","DOI":"10.3389\/fphys.2017.00922","article-title":"Respiratory frequency during exercise: The neglected physiological measure","volume":"8","author":"Massaroni","year":"2017","journal-title":"Front. Physiol."},{"key":"ref_3","doi-asserted-by":"crossref","first-page":"620955","DOI":"10.3389\/fphys.2020.620955","article-title":"Cardiopulmonary Exercise Testing in the Assessment of Dysfunctional Breathing","volume":"11","author":"Ionescu","year":"2020","journal-title":"Front. Physiol."},{"key":"ref_4","doi-asserted-by":"crossref","first-page":"80","DOI":"10.1136\/bjsm.2003.009316","article-title":"A nomogram for assessment of breathing patterns during treadmill exercise","volume":"39","author":"Naranjo","year":"2005","journal-title":"Br. J. Sports Med."},{"key":"ref_5","doi-asserted-by":"crossref","unstructured":"Daley, M.A., Bramble, D.M., and Carrier, D.R. (2013). Impact loading and locomotor-respiratory coordination significantly influence breathing dynamics in running humans. PLoS ONE, 8.","DOI":"10.1371\/journal.pone.0070752"},{"key":"ref_6","doi-asserted-by":"crossref","unstructured":"Massaroni, C., Nicol\u00f2, A., Lo Presti, D., Sacchetti, M., Silvestri, S., and Schena, E. (2019). Contact-based methods for measuring respiratory rate. Sensors, 19.","DOI":"10.3390\/s19040908"},{"key":"ref_7","doi-asserted-by":"crossref","unstructured":"Di Tocco, J., Massaroni, C., Bravi, M., Miccinilli, S., Sterzi, S., Formica, D., and Schena, E. (2020, January 25\u201328). Evaluation of thoraco-abdominal asynchrony using conductive textiles. Proceedings of the 2020 IEEE International Instrumentation and Measurement Technology Conference (I2MTC), Dubrovnik, Croatia.","DOI":"10.1109\/I2MTC43012.2020.9128603"},{"key":"ref_8","doi-asserted-by":"crossref","unstructured":"Cherif, N.H., Mezghani, N., Gaudreault, N., Ouakrim, Y., Mouzoune, I., and Boulay, P. (2018, January 19\u201321). Physiological data validation of the hexoskin smart textile. Proceedings of the 11th International Joint Conference on Biomedical Engineering Systems and Technologies (BIOSTEC 2018), Funchal, Portugal.","DOI":"10.5220\/0006588001500156"},{"key":"ref_9","unstructured":"Phillips, M.B., Beach, J., Cathey, M., Lockert, J., and Satterfield, W. (2017). Reliability and validity of the Hexoskin wearable body metrics telemetry shirt. J. Sport Hum. Perform., 5."},{"key":"ref_10","doi-asserted-by":"crossref","first-page":"118","DOI":"10.1080\/19346182.2016.1248973","article-title":"Validation of Hexoskin biometric shirt to COSMED K4 b2 metabolic unit in adults during trail running","volume":"8","author":"Tanner","year":"2015","journal-title":"Sports Technol."},{"key":"ref_11","doi-asserted-by":"crossref","unstructured":"Vanegas, E., Igual, R., and Plaza, I. (2020). Sensing systems for respiration monitoring: A technical systematic review. Sensors, 20.","DOI":"10.3390\/s20185446"},{"key":"ref_12","doi-asserted-by":"crossref","first-page":"4652","DOI":"10.1109\/JSEN.2019.2899658","article-title":"Validation of a wearable device and an algorithm for respiratory monitoring during exercise","volume":"19","author":"Massaroni","year":"2019","journal-title":"IEEE Sens. J."},{"key":"ref_13","doi-asserted-by":"crossref","first-page":"234","DOI":"10.1016\/j.resp.2006.12.001","article-title":"Respiratory inductive plethysmography to assess respiratory variability and complexity in humans","volume":"156","author":"Fiamma","year":"2007","journal-title":"Respir. Physiol. Neurobiol."},{"key":"ref_14","doi-asserted-by":"crossref","first-page":"45","DOI":"10.4103\/ijoy.IJOY_27_17","article-title":"Breath rate variability: A novel measure to study the meditation effects","volume":"12","author":"Soni","year":"2019","journal-title":"Int. J. Yoga"},{"key":"ref_15","doi-asserted-by":"crossref","first-page":"18","DOI":"10.3389\/fspor.2019.00018","article-title":"Development and Validation of a Gyroscope-Based Turn Detection Algorithm for Alpine Skiing in the Field","volume":"1","author":"Martinez","year":"2019","journal-title":"Front. Sports Act. Living"},{"key":"ref_16","doi-asserted-by":"crossref","first-page":"201","DOI":"10.1080\/1091367X.2017.1331166","article-title":"Comparative Accuracy of a Wrist-Worn Activity Tracker and a Smart Shirt for Physical Activity Assessment","volume":"21","author":"Montoye","year":"2017","journal-title":"Meas. Phys. Educ. Exerc. Sci."},{"key":"ref_17","doi-asserted-by":"crossref","first-page":"85","DOI":"10.1002\/uog.122","article-title":"Applying the right statistics: Analyses of measurement studies","volume":"22","author":"Bland","year":"2003","journal-title":"Ultrasound Obstet. Gynecol. Off. J. Int. Soc. Ultrasound Obstet. Gynecol."},{"key":"ref_18","doi-asserted-by":"crossref","first-page":"95","DOI":"10.2165\/11319670-000000000-00000","article-title":"Recommendations for improved data processing from expired gas analysis indirect calorimetry","volume":"40","author":"Robergs","year":"2010","journal-title":"Sports Med."},{"key":"ref_19","doi-asserted-by":"crossref","unstructured":"Passing, H., and Bablok, W. (1983). A new biometrical procedure for testing the equality of measurements from two different analytical methods. Application of linear regression procedures for method comparison studies in clinical chemistry, Part I. J. Clin. Chem. Clin. Biochem., 709\u2013720.","DOI":"10.1515\/cclm.1983.21.11.709"},{"key":"ref_20","doi-asserted-by":"crossref","first-page":"1763","DOI":"10.1213\/ANE.0000000000002864","article-title":"Correlation Coefficients: Appropriate Use and Interpretation","volume":"126","author":"Schober","year":"2018","journal-title":"Anesth. Analg."},{"key":"ref_21","doi-asserted-by":"crossref","first-page":"24","DOI":"10.1016\/j.biopsycho.2012.12.001","article-title":"Respiratory variability and sighing: A psychophysiological reset model","volume":"93","author":"Vlemincx","year":"2013","journal-title":"Biol. Psychol."},{"key":"ref_22","doi-asserted-by":"crossref","unstructured":"Bernardi, E., Pratali, L., Mandolesi, G., Spiridonova, M., Roi, G.S., and Cogo, A. (2017). Thoraco-abdominal coordination and performance during uphill running at altitude. PLoS ONE, 12.","DOI":"10.1371\/journal.pone.0174927"},{"key":"ref_23","doi-asserted-by":"crossref","first-page":"1","DOI":"10.2165\/00007256-200030010-00001","article-title":"Measures of reliability in sports medicine and science","volume":"30","author":"Hopkins","year":"2000","journal-title":"Sports Med."},{"key":"ref_24","doi-asserted-by":"crossref","first-page":"1019","DOI":"10.1139\/apnm-2015-0140","article-title":"Validation of the Hexoskin wearable vest during lying, sitting, standing, and walking activities","volume":"40","author":"Villar","year":"2015","journal-title":"Appl. Physiol. Nutr. Metab."},{"key":"ref_25","doi-asserted-by":"crossref","first-page":"1437","DOI":"10.1519\/JSC.0000000000002005","article-title":"Validity and reliability of the Hexoskin wearable biometric vest during maximal aerobic power testing in elite cyclists","volume":"33","author":"Elliot","year":"2019","journal-title":"J. Strength Cond. Res."},{"key":"ref_26","unstructured":"Raffoul, D. (2020). Validation and Responsiveness of Wearable Biometric Technology to Monitor Cardiac and Ventilatory Parameters at Rest and During Exercise in COPD, McGill University."},{"key":"ref_27","doi-asserted-by":"crossref","first-page":"e104","DOI":"10.1097\/JOM.0000000000001537","article-title":"Laboratory Validation of Hexoskin Biometric Shirt at Rest, Submaximal Exercise, and Maximal Exercise While Riding a Stationary Bicycle","volume":"61","author":"Smith","year":"2019","journal-title":"J. Occup. Environ. Med."},{"key":"ref_28","doi-asserted-by":"crossref","first-page":"8146809","DOI":"10.1155\/2016\/8146809","article-title":"Respiratory Changes in Response to Cognitive Load: A Systematic Review","volume":"2016","author":"Grassmann","year":"2016","journal-title":"Neural Plast."},{"key":"ref_29","unstructured":"Andrade, A. (2013). Fractal Physiology, Breath-to-Breath Variability and Respiratory Diseases: An Introduction to Complex Systems Theory Application in Pulmonary and Critical Care Medicine. Pract. Appl. Biomed. Eng."},{"key":"ref_30","doi-asserted-by":"crossref","first-page":"287","DOI":"10.1183\/16000617.0088-2015","article-title":"Dysfunctional breathing: A review of the literature and proposal for classification","volume":"25","author":"Boulding","year":"2016","journal-title":"Eur. Respir. Rev."},{"key":"ref_31","doi-asserted-by":"crossref","first-page":"2836","DOI":"10.1109\/TBME.2017.2675941","article-title":"Reference-Free Adjustment of Respiratory Inductance Plethysmography for Measurements during Physical Exercise","volume":"64","author":"Leutheuser","year":"2017","journal-title":"IEEE Trans. Biomed. Eng."},{"key":"ref_32","doi-asserted-by":"crossref","first-page":"511","DOI":"10.1080\/02701367.2018.1510172","article-title":"Cardiorespiratory Responses to Downhill Versus Uphill Running in Endurance Athletes","volume":"89","author":"Lemire","year":"2018","journal-title":"Res. Q. Exerc. Sport"},{"key":"ref_33","doi-asserted-by":"crossref","first-page":"1515","DOI":"10.1152\/jappl.1985.59.5.1515","article-title":"Separation of factors responsible for change in breathing pattern induced by instrumentation","volume":"59","author":"Perez","year":"1985","journal-title":"J. Appl. Physiol."}],"container-title":["Sensors"],"original-title":[],"language":"en","link":[{"URL":"https:\/\/www.mdpi.com\/1424-8220\/21\/16\/5606\/pdf","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2025,10,11]],"date-time":"2025-10-11T06:47:48Z","timestamp":1760165268000},"score":1,"resource":{"primary":{"URL":"https:\/\/www.mdpi.com\/1424-8220\/21\/16\/5606"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2021,8,20]]},"references-count":33,"journal-issue":{"issue":"16","published-online":{"date-parts":[[2021,8]]}},"alternative-id":["s21165606"],"URL":"https:\/\/doi.org\/10.3390\/s21165606","relation":{},"ISSN":["1424-8220"],"issn-type":[{"value":"1424-8220","type":"electronic"}],"subject":[],"published":{"date-parts":[[2021,8,20]]}}}