{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,1,23]],"date-time":"2026-01-23T10:41:02Z","timestamp":1769164862290,"version":"3.49.0"},"reference-count":39,"publisher":"MDPI AG","issue":"12","license":[{"start":{"date-parts":[[2022,6,11]],"date-time":"2022-06-11T00:00:00Z","timestamp":1654905600000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"DOI":"10.13039\/501100004329","name":"Slovenian Research Agency","doi-asserted-by":"publisher","award":["P5-014"],"award-info":[{"award-number":["P5-014"]}],"id":[{"id":"10.13039\/501100004329","id-type":"DOI","asserted-by":"publisher"}]},{"DOI":"10.13039\/501100004329","name":"Slovenian Research Agency","doi-asserted-by":"publisher","award":["P2-0069"],"award-info":[{"award-number":["P2-0069"]}],"id":[{"id":"10.13039\/501100004329","id-type":"DOI","asserted-by":"publisher"}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Sensors"],"abstract":"<jats:p>The purpose of this article is to present the use of a previously validated wearable sensor device, Armbeep, in a real-life application, to enhance a tennis player\u2019s training by monitoring and analysis of the time, physiological, movement, and tennis-specific workload and recovery indicators, based on fused sensor data acquired by the wearable sensor\u2014a miniature wearable sensor device, designed to be worn on a wrist, that can detect and record movement and biometric information, where the basic signal processing is performed directly on the device, while the more complex signal analysis is performed in the cloud. The inertial measurements and pulse-rate detection of the wearable device were validated previously, showing acceptability for monitoring workload and recovery during tennis practice and matches. This study is one of the first attempts to monitor the daily workload and recovery of tennis players under real conditions. Based on these data, we can instruct the coach and the player to adjust the daily workload. This optimizes the level of an athlete\u2019s training load, increases the effectiveness of training, enables an individual approach, and reduces the possibility of overuse or injuries. This study is a practical example of the use of modern technology in the return of injured athletes to normal training and competition. This information will help tennis coaches and players to objectify their workloads during training and competitions, as this is usually only an intuitive assessment.<\/jats:p>","DOI":"10.3390\/s22124436","type":"journal-article","created":{"date-parts":[[2022,6,13]],"date-time":"2022-06-13T02:01:44Z","timestamp":1655085704000},"page":"4436","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":11,"title":["Real-Life Application of a Wearable Device towards Injury Prevention in Tennis: A Single-Case Study"],"prefix":"10.3390","volume":"22","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-9609-3218","authenticated-orcid":false,"given":"Iztok","family":"Kramberger","sequence":"first","affiliation":[{"name":"Faculty of Electrical Engineering and Computer Science, University of Maribor, Koro\u0161ka Cesta 046, 2000 Maribor, Slovenia"}]},{"given":"Ale\u0161","family":"Filip\u010di\u010d","sequence":"additional","affiliation":[{"name":"Faculty of Sport, University of Ljubljana, Gortanova 22, 1000 Ljubljana, Slovenia"}]},{"given":"Ale\u0161","family":"Germi\u010d","sequence":"additional","affiliation":[{"name":"Faculty of Sport, University of Ljubljana, Gortanova 22, 1000 Ljubljana, Slovenia"}]},{"given":"Marko","family":"Kos","sequence":"additional","affiliation":[{"name":"Faculty of Electrical Engineering and Computer Science, University of Maribor, Koro\u0161ka Cesta 046, 2000 Maribor, Slovenia"}]}],"member":"1968","published-online":{"date-parts":[[2022,6,11]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","unstructured":"Benages Pardo, L., Buldain Perez, D., and Orrite Uru\u00f1uela, C. (2019). Detection of Tennis Activities with Wearable Sensors. Sensors, 19.","DOI":"10.3390\/s19225004"},{"key":"ref_2","first-page":"489","article-title":"Comparing matchplay characteristics and physical demands of junior and professional tennis athletes in the era of big data","volume":"16","author":"Kovalchik","year":"2017","journal-title":"J. Sports Sci. Med."},{"key":"ref_3","doi-asserted-by":"crossref","first-page":"1065","DOI":"10.1007\/s40279-015-0332-9","article-title":"The Use of Wearable Microsensors to Quantify Sport-Specific Movements","volume":"45","author":"Chambers","year":"2015","journal-title":"Sports Med."},{"key":"ref_4","first-page":"6411","article-title":"A wearable device and system for movement and biometric data acquisition for sports applications","volume":"5","author":"Kos","year":"2017","journal-title":"IEEE Access"},{"key":"ref_5","doi-asserted-by":"crossref","unstructured":"Adesida, Y., Papi, E., and McGregor, A.H. (2019). Exploring the role of wearable technology in sport kinematics and kinetics: A systematic review. Sensors, 19.","DOI":"10.3390\/s19071597"},{"key":"ref_6","doi-asserted-by":"crossref","unstructured":"Anand, A., Sharma, M., Srivastava, R., Kaligounder, L., and Prakash, D. (2017, January 18\u201321). Wearable Motion Sensor Based Analysis of Swing Sports. Proceedings of the 2017 16th IEEE International Conference on Machine Learning and Applications (ICMLA), Cancun, Mexico.","DOI":"10.1109\/ICMLA.2017.0-149"},{"key":"ref_7","doi-asserted-by":"crossref","first-page":"129","DOI":"10.1080\/19346182.2009.9648510","article-title":"Towards a wearable device for skill assessment and skill acquisition of a tennis player during the first serve","volume":"2","author":"Ahmadi","year":"2009","journal-title":"Sports Technol."},{"key":"ref_8","doi-asserted-by":"crossref","unstructured":"Connaghan, D., Kelly, P., O\u2019Connor, N.E., Gaffney, M., Walsh, M., and O\u2019Mathuna, C. (2011, January 28\u201331). Multi-sensor classification of tennis strokes. Proceedings of the 2011 IEEE SENSORS Proceedings, Limerick, Ireland.","DOI":"10.1109\/ICSENS.2011.6127084"},{"key":"ref_9","doi-asserted-by":"crossref","unstructured":"Had\u017ei\u0107, V., Germi\u010d, A., and Filip\u010di\u010d, A. (2021). Validity and reliability of a novel monitoring sensor for the quantification of the hitting load in tennis. PLoS ONE, 16.","DOI":"10.1371\/journal.pone.0255339"},{"key":"ref_10","doi-asserted-by":"crossref","first-page":"1212","DOI":"10.1123\/ijspp.2016-0683","article-title":"Monitoring Hitting Load in Tennis Using Inertial Sensors and Machine Learning","volume":"12","author":"Whiteside","year":"2017","journal-title":"Int. J. Sports Physiol. Perform."},{"key":"ref_11","doi-asserted-by":"crossref","unstructured":"Gim\u00e9nez-Egido, J.M., Ortega, E., Verdu-conesa, I., Cejudo, A., and Torres-luque, G. (2020). Using smart sensors to monitor physical activity and technical\u2013tactical actions in junior tennis players. Int. J. Environ. Res. Public Health, 17.","DOI":"10.3390\/ijerph17031068"},{"key":"ref_12","doi-asserted-by":"crossref","first-page":"101","DOI":"10.52082\/jssm.2021.101","article-title":"Minimal agreement between internal and external training load metrics across a 2-WK training microcycle in elite squash","volume":"20","author":"James","year":"2021","journal-title":"J. Sports Sci. Med."},{"key":"ref_13","doi-asserted-by":"crossref","first-page":"270","DOI":"10.1123\/ijspp.2018-0935","article-title":"Internal and external training load: 15 years on training load: Internal and external load theoretical framework: The training process","volume":"14","author":"Impellizzeri","year":"2019","journal-title":"Int. J. Sports Physiol. Perform."},{"key":"ref_14","doi-asserted-by":"crossref","first-page":"4","DOI":"10.52383\/itfcoaching.v28i80.60","article-title":"Measurement and control of tennis training load: A case study","volume":"28","author":"Genevois","year":"2020","journal-title":"ITF Coach. Sport Sci. Rev."},{"key":"ref_15","first-page":"21","article-title":"Retrospective study of the workload of a female tennis player over two seasons\u2014Single case study","volume":"27","author":"Filipcic","year":"2021","journal-title":"Kinesiol. Slov."},{"key":"ref_16","doi-asserted-by":"crossref","first-page":"109","DOI":"10.3389\/fspor.2020.00109","article-title":"The Impact of Recovery Practices Adopted by Professional Tennis Players on Fatigue Markers According to Training Type Clusters","volume":"2","author":"Poignard","year":"2020","journal-title":"Front. Sports Act. Living"},{"key":"ref_17","doi-asserted-by":"crossref","first-page":"60","DOI":"10.1152\/ajpheart.00335.2007","article-title":"Noninvasive assessment of cardiac parasympathetic function: Postexercise heart rate recovery or heart rate variability?","volume":"293","author":"Buchheit","year":"2007","journal-title":"Am. J. Physiol.-Heart Circ. Physiol."},{"key":"ref_18","doi-asserted-by":"crossref","first-page":"889","DOI":"10.2165\/00007256-200333120-00003","article-title":"Heart rate variability in athletes","volume":"12","author":"Aubert","year":"2003","journal-title":"Sports Med."},{"key":"ref_19","doi-asserted-by":"crossref","first-page":"1041","DOI":"10.1080\/02640410410001729982","article-title":"String vibration dampers do not reduce racket frame vibration transfer to the forearm","volume":"22","author":"Li","year":"2004","journal-title":"J. Sport Sci."},{"key":"ref_20","doi-asserted-by":"crossref","first-page":"S183","DOI":"10.1097\/00005768-200305001-01014","article-title":"Pre-prediction of EPOC: A tool for monitoring fatigue accumulation during exercise","volume":"35","author":"Rusko","year":"2003","journal-title":"Med. Sci. Sports Exerc."},{"key":"ref_21","doi-asserted-by":"crossref","first-page":"79","DOI":"10.2478\/v10078-011-0025-x","article-title":"Functional overreaching during preparation training of elite tennis professionals","volume":"28","author":"Thiel","year":"2011","journal-title":"J. Hum. Kinet."},{"key":"ref_22","doi-asserted-by":"crossref","first-page":"999","DOI":"10.1097\/00005768-200106000-00020","article-title":"A physiological profile of tennis match play","volume":"33","author":"Smekal","year":"2001","journal-title":"Med. Sci. Sports Exerc."},{"key":"ref_23","doi-asserted-by":"crossref","first-page":"696","DOI":"10.1136\/bjsm.2005.021253","article-title":"Performance demands of professional male tennis players","volume":"40","author":"Johnson","year":"2006","journal-title":"Br. J. Sports Med."},{"key":"ref_24","doi-asserted-by":"crossref","first-page":"339","DOI":"10.1007\/s12662-019-00611-3","article-title":"Tennis at tiebreaks: Addressing elite players\u2019 performance for tomorrows\u2019 coaching","volume":"49","author":"Meffert","year":"2019","journal-title":"Ger. J. Exerc. Sport Res."},{"key":"ref_25","doi-asserted-by":"crossref","first-page":"65","DOI":"10.5114\/hm.2020.88155","article-title":"Serve efficiency development at Wimbledon between 2002 and 2015: A longitudinal approach to impact tomorrow\u2019s tennis practice","volume":"21","author":"Grambow","year":"2020","journal-title":"Hum. Mov."},{"key":"ref_26","doi-asserted-by":"crossref","first-page":"66","DOI":"10.36028\/2308-8826-2019-7-4-66-70","article-title":"Competitive activity of elite female tennis players on courts with different cover types","volume":"7","author":"Skorodumova","year":"2019","journal-title":"Sci. Sports Curr. Trends"},{"key":"ref_27","doi-asserted-by":"crossref","first-page":"24","DOI":"10.1177\/1747954118805278","article-title":"The Sony Smart Tennis Sensor accurately measures external workload in junior tennis players","volume":"14","author":"Myers","year":"2019","journal-title":"Int. J. Sports Sci. Coach."},{"key":"ref_28","first-page":"443","article-title":"Heart Rate Variability is a Moderating Factor in the Workload-Injury Relationship of Competitive CrossFitTM Athletes","volume":"16","author":"Williams","year":"2017","journal-title":"J. Sports Sci. Med."},{"key":"ref_29","unstructured":"Crespo, M., and Miley, D. (2002). Advanced Coaches Manual, International Tennis Federation."},{"key":"ref_30","doi-asserted-by":"crossref","first-page":"387","DOI":"10.1136\/bjsm.2005.023168","article-title":"Intensity of tennis match play","volume":"40","author":"Pluim","year":"2006","journal-title":"Br. J. Sports Med."},{"key":"ref_31","doi-asserted-by":"crossref","first-page":"815","DOI":"10.1080\/02640410600875184","article-title":"The physiological cost of velocity coupling during tennis groundstrokes","volume":"25","author":"Cooke","year":"2007","journal-title":"J. Sports Sci."},{"key":"ref_32","doi-asserted-by":"crossref","first-page":"1589","DOI":"10.1080\/02640410802287089","article-title":"Match activity and physiological load during a clay-court tennis tournament in elite female players","volume":"26","year":"2008","journal-title":"J. Sports Sci."},{"key":"ref_33","doi-asserted-by":"crossref","first-page":"711","DOI":"10.1136\/bjsm.2007.036210","article-title":"Match activity and physiological responses during a junior female singles tennis tournament","volume":"41","author":"Terrados","year":"2007","journal-title":"Br. J. Sports Med."},{"key":"ref_34","doi-asserted-by":"crossref","first-page":"296","DOI":"10.1136\/bjsm.2006.030536","article-title":"Activity patterns, blood lactate concentrations and ratings of perceived exertion during a professional singles tennis tournament","volume":"41","author":"Bishop","year":"2007","journal-title":"Br. J. Sports Med."},{"key":"ref_35","doi-asserted-by":"crossref","first-page":"863","DOI":"10.1123\/ijspp.2013-0452","article-title":"A descriptive analysis of internal and external loads for elite-level tennis drills","volume":"9","author":"Murphy","year":"2014","journal-title":"Int. J. Sports Physiol. Perform."},{"key":"ref_36","doi-asserted-by":"crossref","unstructured":"Filipcic, A., Crespo, M., and Filipcic, T. (2022). Practice and match workload of a female tennis player in two annual seasons: A single-case study. Int. J. Sports Sci. Coach.","DOI":"10.1177\/17479541221088836"},{"key":"ref_37","doi-asserted-by":"crossref","first-page":"107","DOI":"10.1080\/026404101300036299","article-title":"A notational analysis of elite tennis strategy","volume":"19","author":"Ingram","year":"2001","journal-title":"J. Sports Sci."},{"key":"ref_38","doi-asserted-by":"crossref","first-page":"532","DOI":"10.1519\/JSC.0b013e31818efe29","article-title":"A Notational Analysis of Elite Tennis Serve and Serve-Return Strategies on Slow Surface","volume":"23","author":"Gillet","year":"2009","journal-title":"J. Strength Cond. Res."},{"key":"ref_39","doi-asserted-by":"crossref","unstructured":"Tibana, R.A., Sousa NMF de Prestes, J., Feito, Y., Ferreira, C.E., and Voltarelli, F.A. (2019). Monitoring Training Load, Well-Being, Heart Rate Variability, and Competitive Performance of a Functional-Fitness Female Athlete: A Case Study. Sports, 7.","DOI":"10.3390\/sports7020035"}],"container-title":["Sensors"],"original-title":[],"language":"en","link":[{"URL":"https:\/\/www.mdpi.com\/1424-8220\/22\/12\/4436\/pdf","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2025,10,10]],"date-time":"2025-10-10T23:28:16Z","timestamp":1760138896000},"score":1,"resource":{"primary":{"URL":"https:\/\/www.mdpi.com\/1424-8220\/22\/12\/4436"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2022,6,11]]},"references-count":39,"journal-issue":{"issue":"12","published-online":{"date-parts":[[2022,6]]}},"alternative-id":["s22124436"],"URL":"https:\/\/doi.org\/10.3390\/s22124436","relation":{},"ISSN":["1424-8220"],"issn-type":[{"value":"1424-8220","type":"electronic"}],"subject":[],"published":{"date-parts":[[2022,6,11]]}}}