Assessment of Moroccan swimming coaches’ nutritional knowledge and self-reported nutrition recommendations: A cross-sectional study
DOI:
https://doi.org/10.58524/jcss.v5i4.1331Keywords:
Nutrition information sources, Nutrition knowledge, Sports nutrition, Swimming coachesAbstract
Background: Sports nutrition plays an important role in recovery, injury prevention, and athletic performance. Coaches often provide nutritional guidance that may influence athletes’ dietary practices.
Aims: This study aimed to assess sports nutrition knowledge among Moroccan swimming coaches, identify their primary sources of nutrition information, and describe their self-reported nutrition recommendations.
Methods: This cross-sectional study included 110 Moroccan swimming coaches from five regional leagues. Data were collected using an online questionnaire covering sociodemographic characteristics, the adapted 49-item Sports Nutrition Knowledge Instrument (49-SNKI), self-reported nutrition recommendations, and sources of nutrition information. Knowledge scores and recommendation counts were compared across gender, age, educational level, coaching experience, and nutrition training using appropriate parametric or non-parametric tests. Holm adjustment was applied for multiple comparisons.
Results: The overall nutrition knowledge score was 30.13 ± 10.29/49 among coaches with complete responses (n = 106), corresponding to a normalized net score of 61.5%. Knowledge varied across domains, with the highest normalized score for micronutrients (82.9%) and the lowest for hydration (52.7%). No statistically detectable differences in overall knowledge were observed by gender, educational level, nutrition training, age, or coaching experience. Most coach characteristics were also not associated with detectable differences in self-reported carbohydrate, protein, fluid, or fat recommendation counts. Nominal differences by nutrition training for carbohydrate and fluid recommendations were no longer significant after Holm adjustment. The Internet was the most frequently reported information source (61.8%), followed by club or federation documents (27.3%).
Conclusion: Hydration showed the lowest normalized net score and may warrant particular attention in future continuing education. Most sociodemographic and professional characteristics were not associated with detectable differences in overall knowledge or self-reported recommendations. The predominant use of the Internet highlights the need for continuing education, particularly on hydration and critical appraisal of online information. The quality and adherence of self-reported recommendations to established sports nutrition guidelines could not be determined.
References
Aka, H. (2020). A research on the evaluation of nutrition knowledge levels of soccer coaches. Prog Nutr, 22, 111-118. https://doi.org/10.23751/pn.v22i1-S.9800
Alahmadi, A. K., & Albassam, R. S. (2023). Assessment of general and sports nutrition knowledge, dietary habits, and nutrient intake of physical activity practitioners and athletes in Riyadh, Saudi Arabia. Nutrients, 15(20), 4353. https://doi.org/10.3390/nu15204353
AlKasasbeh, W., & Akroush, S. (2024). Investigating the interrelationships among food habits, sports nutrition knowledge, and perceived barriers to healthy eating: a study of adolescent swimmers. Frontiers in nutrition, 11, 1381801. https://doi.org/10.3389/fnut.2024.1381801
Altınok, Ö., & Baş, M. (2025). Coach candidates’ and coaches’ nutrition knowledge affects dietary recommendations indirectly: Mediator effects of self-efficacy. Nutrients, 17(3), 589. https://doi.org/10.3390/nu17030589
Bakhtiar, M., Masud-ur-Rahman, M., Kamruzzaman, M., Sultana, N., & Rahman, S. S. (2021). Determinants of nutrition knowledge, attitude and practices of adolescent sports trainee: A cross-sectional study in Bangladesh. Heliyon, 7(4). https://doi.org/10.1016/j.heliyon.2021.e06637
Bentley, M. R., Mitchell, N., & Backhouse, S. H. (2020). Sports nutrition interventions: A systematic review of behavioural strategies used to promote dietary behaviour change in athletes. Appetite, 150, 104645. https://doi.org/10.1016/j.appet.2020.104645
Boumosleh, J. M., El Hage, C., & Farhat, A. (2021). Sports nutrition knowledge and perceptions among professional basketball athletes and coaches in Lebanon-a cross-sectional study. BMC Sports Science, Medicine and Rehabilitation, 13(1), 53. https://doi.org/10.1186/s13102-021-00280-6
Burger, S., Bray, A., & Kim, B. (2024). The relationship between nutrition knowledge and low energy availability risk in collegiate athletes. Journal of Science and Medicine in Sport, 27(7), 451-453. https://doi.org/10.1016/j.jsams.2024.03.010
Carey, C. C., Doyle, L., & Lucey, A. (2023). Nutritional priorities, practices and preferences of athletes and active individuals in the context of new product development in the sports nutrition sector. Frontiers in sports and active living, 5, 1088979. https://doi.org/10.3389/fspor.2023.1088979
Choi, H., Jeong, Y., & Kim, S.-K. (2020). The relationship between coaching behavior and athlete burnout: Mediating effects of communication and the coach–athlete relationship. International journal of environmental research and public health, 17(22), 8618. https://doi.org/10.3390/ijerph17228618
Couture, S., Lamarche, B., Morissette, E., Provencher, V., Valois, P., Goulet, C., & Drapeau, V. (2015). Evaluation of sports nutrition knowledge and recommendations among high school coaches. International journal of sport nutrition and exercise metabolism, 25(4), 326-334. https://doi.org/10.1123/ijsnem.2014-0195
Danaher, K., & Curley, T. (2014). Nutrition knowledge and practices of varsity coaches at a Canadian university. Canadian Journal of Dietetic Practice and Research, 75(4), 210-213. https://doi.org/10.3148/cjdpr-2014-021
Domínguez, R., Jesús-Sánchez-Oliver, A., Cuenca, E., Jodra, P., Da Silva, S. F., & Mata-Ordóñez, F. (2017). Nutritional needs in the professional practice of swimming: a review. Journal of exercise nutrition & biochemistry, 21(4), 1. https://doi.org/10.20463/jenb.2017.0030
Elsahoryi, N. A., Trakman, G., & Al Kilani, A. (2021). General and sports nutrition knowledge among Jordanian adult coaches and athletes: A cross-sectional survey. PLoS One, 16(11), e0258123. https://doi.org/10.1371/journal.pone.0258123
Eskici, G., Yarar, H., & Koc, H. (2016). Nutritional knowledge and status of coaches in various sporting codes. South African Journal for Research in Sport, Physical Education and Recreation, 38(1), 59-73.
Fernandes, V., Rodrigues, F., Jacinto, M., Teixeira, D., Cid, L., Antunes, R., Matos, R., Reigal, R., Hernández-Mendo, A., & Morales-Sánchez, V. (2023). How does the level of physical activity influence eating behavior? A self-determination theory approach. Life, 13(2), 298. https://doi.org/10.3390/life13020298
Hamer, J., Desbrow, B., & Irwin, C. (2023). A review exploring coach knowledge, attitudes/beliefs and behaviours towards low energy availability in athletes. International Journal of Sports Science & Coaching, 18(3), 945-969. https://doi.org/10.1177/17479541221140188
Heikkilä, M., Lehtovirta, M., Autio, O., Fogelholm, M., & Valve, R. (2019). The impact of nutrition education intervention with and without a mobile phone application on nutrition knowledge among young endurance athletes. Nutrients, 11(9), 2249. https://doi.org/10.3390/nu11092249
Hulland, S. C., Trakman, G. L., & Alcock, R. D. (2024). Adolescent athletes have better general than sports nutrition knowledge and lack awareness of supplement recommendations: A systematic literature review. British Journal of Nutrition, 131(8), 1362-1376. https://doi.org/10.1017/S0007114523002799
Jacob, R., Lamarche, B., Provencher, V., Laramée, C., Valois, P., Goulet, C., & Drapeau, V. (2016). Evaluation of a theory-based intervention aimed at improving coaches’ recommendations on sports nutrition to their athletes. Journal of the Academy of Nutrition and Dietetics, 116(8), 1308-1315. https://doi.org/10.1016/j.jand.2016.04.005
Jagim, A. R., Fields, J. B., Magee, M., Kerksick, C., Luedke, J., Erickson, J., & Jones, M. T. (2021). The influence of sport nutrition knowledge on body composition and perceptions of dietary requirements in collegiate athletes. Nutrients, 13(7), 2239. https://doi.org/10.3390/nu13072239
Janiczak, A., Devlin, B. L., Forsyth, A., & Trakman, G. L. (2022). A systematic review update of athletes’ nutrition knowledge and association with dietary intake. British Journal of Nutrition, 128(6), 1156-1169. https://doi.org/10.1017/S0007114521004311
Juzwiak, C. R., & Ancona-Lopez, F. (2004). Evaluation of nutrition knowledge and dietary recommendations by coaches of adolescent Brazilian athletes. International journal of sport nutrition and exercise metabolism, 14(2), 222-235. https://doi.org/10.1123/ijsnem.14.2.222
Karpinski, C. A., Dolins, K. R., & Bachman, J. (2019). Development and validation of a 49-item sports nutrition knowledge instrument (49-SNKI) for adult athletes. Topics in Clinical Nutrition, 34(3), 174-185. https://doi.org/10.1097/TIN.0000000000000180
Kaufman, M., Nguyen, C., Shetty, M., Oppezzo, M., Barrack, M., & Fredericson, M. (2023). Popular dietary trends’ impact on athletic performance: a critical analysis review. Nutrients, 15(16), 3511. https://doi.org/10.3390/nu15163511
Kim, J., & Kim, J. (2019). Nutritional supplement for athletic performance: Based on Australian Institute of Sport sports supplement framework. Exercise Science, 28(3), 211-220. https://doi.org/10.15857/ksep.2019.28.3.211
Klein, D. J., Eck, K. M., Walker, A. J., Pellegrino, J. K., & Freidenreich, D. J. (2021). Assessment of sport nutrition knowledge, dietary practices, and sources of nutrition information in NCAA division III collegiate athletes. Nutrients, 13(9), 2962. https://doi.org/10.3390/nu13092962
Lambert, V., Carbuhn, A., Culp, A., Ketterly, J., Twombley, B., & White, D. (2022). Interassociation consensus statement on sports nutrition models for the provision of nutrition services from registered dietitian nutritionists in collegiate athletics. Journal of athletic training, 57(8), 717-732. https://doi.org/10.4085/1062-6050-0157.22
Lynch, N., Sweeney, G., Cradock, K., & Mullee, A. (2024). An investigation into nutritional knowledge of Irish rugby coaches. Proceedings of the Nutrition Society, 83(OCE4), E327. https://doi.org/10.1017/S0029665124005652
Noronha, D. C., Santos, M. I., Santos, A. A., Corrente, L. G., Fernandes, R. K., Barreto, A. C., Santos, R. G., Santos, R. S., Gomes, L. P., & Nascimento, M. V. (2020). Nutrition knowledge is correlated with a better dietary intake in adolescent soccer players: A cross‐sectional study. Journal of nutrition and metabolism, 2020(1), 3519781. https://doi.org/10.1155/2020/3519781
Parmenter, K., & Wardle, J. (2000). Evaluation and design of nutrition knowledge measures. Journal of Nutrition Education, 32(5), 269-277. https://doi.org/10.1016/S0022-3182(00)70575-9
Smith-Rockwell, M., Nickols-Richardson, S., & Thye, F. (2001). Nutrition knowledge, opinions, and practices of coaches and athletic trainers at a division 1 university. International journal of sport nutrition and exercise metabolism, 11(2), 174-185. https://doi.org/10.1123/ijsnem.11.2.174
Sung, J.-Y., Lee, J.-H., & Lee, K.-L. (2024). Analysis of the diet, weight-loss behavior, and nutritional knowledge of athletes and coaches in weightclass sports: influence of a coach’s nutritional knowledge on athletes. Journal of the International Society of Sports Nutrition, 21(1), 2405159. https://doi.org/10.1080/15502783.2024.2405159
Tam, R., Beck, K. L., Manore, M. M., Gifford, J., Flood, V. M., & O’Connor, H. (2019). Effectiveness of education interventions designed to improve nutrition knowledge in athletes: a systematic review. Sports medicine, 49(11), 1769-1786. https://doi.org/10.1007/s40279-019-01157-y
Torres-McGehee, T. M., Pritchett, K. L., Zippel, D., Minton, D. M., Cellamare, A., & Sibilia, M. (2012). Sports nutrition knowledge among collegiate athletes, coaches, athletic trainers, and strength and conditioning specialists. Journal of athletic training, 47(2), 205-211. https://doi.org/10.4085/1062-6050-47.2.205
Voelker, D. K., Visek, A. J., Learner, J. L., & DiBiasio, M. (2022). Toward understanding of coaches’ role in athletes’ eating pathology: A systematic review and ecological application to advance research. Psychology of Sport and Exercise, 58, 102059. https://doi.org/10.1016/j.psychsport.2021.102059
Zinn, C., Schofield, G., & Wall, C. (2006). Evaluation of sports nutrition knowledge of New Zealand premier club rugby coaches. International journal of sport nutrition and exercise metabolism, 16(2), 214-225. https://doi.org/10.1123/ijsnem.16.2.214
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