This study describes a beta version of a mobile application (app) that focuses on preventing chronic fatigue in Czech youth athletes. The first version of the SmartTraining app was developed for athletes as a way to prevent chronic fatigue via alertness and education. For alertness, a multistage process was developed using a combination of parameters about training responses, such as tiredness, well-being, heart rate, energy balance and psychological, and health-related aspects. According to the combination of the multistage parameter outcomes, the algorithm classifies the risk of fatigue based on semaphore light: green corresponds to low, yellow to moderate and red to high risk. The education presented in the app consisted of written and "animated videos" material about the variables involved in training, such as training demands and athletes' responses, regeneration, nutrition and communication between athletes, coaches, and parents. Subsequently, a beta version of the app was created and freely available to download for Android or iOS mobile. The app can be used in daily routines to reduce the risk of chronic fatigue from inadequate training dose response. Prevention can minimise the risk of injury or physical and emotional burnout in youth. Informing athletes on how to carefully handle the training factors can improve athletes' awareness of their performance and health status. Collaboration between sports scientists and the commercial sector allows for the efficient development of an easy-to-use and low-cost tool for use in sports settings. Future steps should be performed to validate the app's accuracy in its alertness and in the efficiency of the educational process.

Department of Health Promotion Faculty of Sports Studies Masaryk University Brno Czechia

Department of Kinesiology Faculty of Sports Studies Masaryk University Brno Czechia

Incubator of Kinanthropology Research Faculty of Sports Studies Masaryk University Brno Czechia

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Bosquet L., Merkari S., Arvisais D., Aubert A. E. (2008). Is heart rate a convenient tool to monitor over-reaching? A systematic review of the literature. Br. J. Sports Med. 42, 709–714. 10.1136/bjsm.2007.042200 PubMed DOI

Budgett R. (2000). Overtraining and chronic fatigue: The unexplained underperformance syndrome (UPS). Int. Sportmed J. 1 (3), 16–27.

Burešová I., Květon P., Jelínek M. (2021). Psychological context of overtraining syndrome in elite athletes in adolescence: Literature review. StS. 15 (1), 36–50. 10.5817/sts2021-1-4 DOI

Center for Disease Control and Prevention (2022). HedsUp. Available at: https://www.cdc.gov/HeadsUp .

Cookson A., Kim D., Hartsell T. (2020). Enhancing student achievement, engagement, and satisfaction using animated instructional videos. Int. J. Inf. Commun. Technol. Educ. 16 (3), 113–125. 10.4018/IJICTE.2020070108 DOI

DiFiori J. P., Benjamin H. J., Brenner J., Gregory A., Jayanthi N., Landry G., et al. (2014). Overuse injuries and burnout in youth sports: A position statement from the American medical society for sports medicine. Clin. J. Sport Med. 24 (1), 3–20. 10.1097/JSM.0000000000000060 PubMed DOI

Djordjevic D., Stanojevic D., Tosic J. S. (2013). Heart rate modulations in overtraining syndrome. Ser. J. Exp. Clin. Res. 14 (3), 125–133. 10.5937/sjecr14-4388 DOI

EFSA (European Food Safety Authority) (2017). Dietary reference values for nutrients summary report. EFSA Support. Publ. 14 (12), E15121–E15198. 10.2903/sp.efsa.2017.e15121 DOI

Eikey E. V. (2021). Effects of diet and fitness apps on eating disorder behaviours: Qualitative study. BJPsych Open 7 (5), e176. 10.1192/bjo.2021.1011 DOI

Elliot D. L., Goldberg L., Moe E. L., DeFrancesco C. A., Durham M. B., Hix-Small H. (2004). Preventing substance use and disordered eating: Initial outcomes of the ATHENA (athletes targeting healthy exercise and nutrition alternatives) program. Arch. Pediatr. Adolesc. Med. 158 (11), 1043–1049. 10.1001/archpedi.158.11.1043 PubMed DOI

Fry A. C., Kraemer W. J., Van Borselen F., Lynch J. M., Marsit J. L., Roy E. P., et al. (1994). Performance decrements with high-intensity resistance exercise overtraining.. Med. Sci. Sports Exerc. 26, 1165–1173. 10.1249/00005768-199409000-00015 PubMed DOI

Jonvik K. L., King M., Rollo I., Stellingwerff T., Pitsiladis Y. (2022). New opportunities to advance the field of sports nutrition. Front. Sports Act. Living 4, 852230. 10.3389/fspor.2022.852230 PubMed DOI PMC

Kenttä G., Hassmén P., Raglin J. S. (2001). Training practices and overtraining syndrome in Swedish age-group athletes. Int. J. Sports Med. 22 (06), 460–465. 10.1055/s-2001-16250 PubMed DOI

Kliethermes S. A., Marshall S. W., LaBella C. R., Watson A. M., Brenner J. S., Nagle K. B., et al. (2021). Defining a research agenda for youth sport specialisation in the USA: The AMSSM youth early sport specialization summit. Br. J. Sports Med. 55 (3), 135–143. 10.1136/bjsports-2020-102699 PubMed DOI

Květon P., Jelínek M., Burešová I., Bartošová K. (2020). Czech adaptation of the Brunel Mood States for adolescent athletes. StS. 14, 47–57. 10.5817/sts2020-1-6 DOI

Malina R. M. (2010). Early sport specialization: Roots, effectiveness, risks. Curr. Sports Med. Rep. 9 (6), 364–371. 10.1249/JSR.0b013e3181fe3166 PubMed DOI

Matos N. F., Winsley R., Williams C. (2011). Prevalence of nonfunctional overreaching/overtraining in young English athletes. Med. Sci. Sports Exerc. 43 (7), 1287–1294. 10.1249/MSS.0b013e318207f87b PubMed DOI

McGuigan M. (2017). Monitoring training and performance in athletes. Champaign, IL: Human Kinetics.

McKay C. D., Cumming S. P., Blake T. (2019). Youth sport: Friend or foe? Best. Pract. Res. Clin. Rheumatol. 33 (1), 141–157. 10.1016/j.berh.2019.01.017 PubMed DOI

Raglin J., Sawamura S., Alexiou S., Hassmén P., Kenttä G. (2000). Training practices and staleness in 13–18-year-old swimmers: A cross-cultural study. Pediatr. Exerc. Sci. 12 (1), 61–70. 10.1123/pes.12.1.61 DOI

Sarmiento K., Hoffman R., Dmitrovsky Z., Lee R. (2014). A 10-year review of the Centers for Disease Control and Prevention’s Heads up initiatives: Bringing concussion awareness to the forefront. J. Saf. Res. 50, 143–147. 10.1016/j.jsr.2014.05.003 PubMed DOI PMC

Schneider C., Hanakam F., Wiewelhove T., Döweling A., Kellmann M., Meyer T., et al. (2018). Heart rate monitoring in team sports—a conceptual framework for contextualizing heart rate measures for training and recovery prescription. Front. Physiol. 639. 10.3389/fphys.2018.00639 PubMed DOI PMC

Stellingwerff T., Heikura I. A., Meeusen R., Bermon S., Seiler S., Mountjoy M. L., et al. (2021). Overtraining syndrome (OTS) and relative energy deficiency in sport (RED-S): Shared pathways, symptoms and complexities. Sports Med. 51 (11), 2251–2280. 10.1007/s40279-021-01491-0 PubMed DOI

Watson L. P., Carr K. S., Venables M. C., Acerini C. L., Lyons G., Moran C., et al. (2019). Quantifying energy expenditure in childhood: utility in managing pediatric metabolic disorders. Am. J. Clin. Nutr. 110 (5), 1186–1191. 10.1093/ajcn/nqz177 PubMed DOI PMC

Weakley J., Halson S. L., Mujika I. (2022). Overtraining syndrome symptoms and diagnosis in athletes: Where is the research? A systematic review. Int. J. Sports Physiol. Perform. 1, 675–681. 10.1123/ijspp.2021-0448 PubMed DOI

Williamson R. W., Gerhardstein D., Cardenas J., Michael D. B., Theodore N., Rosseau N. (2014). Concussion 101: The current state of concussion education programs. Neurosurgery 75 (4), S131–S135. 10.1227/NEU.0000000000000482 PubMed DOI