RESEARCH PAPER
The dRM-Index: Applicability of the Differential Respiratory-to-Muscular Training Load Index in Young Female Soccer Players
1
Department of Physical Education and Sport, Faculty of Education and Sport, University of the Basque Country UPV/EHU, Vitoria-Gasteiz, Araba, Spain.
2
Department of Strength and Conditioning, Sociedad Deportiva Eibar, Eibar, Gipuzkoa, Spain.
3
Society, Sports, and Exercise Research Group (GIKAFIT), University of the Basque Country UPV/EHU, Vitoria-Gasteiz, Araba, Spain.
4
Physical Activity, Exercise, and Health Group, Bioaraba Health Research Institute, Vitoria-Gasteiz, Araba, Spain.
Submission date: 2024-10-07
Final revision date: 2025-07-29
Acceptance date: 2025-09-25
Publication date: 2026-04-02
Corresponding author
Ibai García-Tabar
Department of Physical Education and Sport, Faculty of Education and Sport, University of the Basque Country UPV/EHU, Lasarteko atea 71, 01007, Vitoria-Gasteiz, Araba, Spain
Department of Physical Education and Sport, Faculty of Education and Sport, University of the Basque Country UPV/EHU, Lasarteko atea 71, 01007, Vitoria-Gasteiz, Araba, Spain
Journal of Human Kinetics 2026;101:73-86
KEYWORDS
TOPICS
ABSTRACT
This study described the differential respiratory and muscular perceived training loads (RPEres-TL and RPEmus-TL) within and between sessions, and investigated the associations between neuromuscular performance and the dRM-Index (i.e., the ratio of differential respiratory and muscular perceived training loads: RPEres-TL divided by RPEmus-TL) among youth female soccer players. Thirteen outfield players (age: 17 ± 1 years) of the third team of a Women’s Soccer Spanish First Division Club completed the 14-week study period. Neuromuscular performance tests (countermovement jump [CMJ], CMJ arm swing, single leg CMJ, and 30-m sprint tests) were conducted before (T1) and after (T2) the study period. Players improved neuromuscular performance (p < 0.05; Cohen’s d < 1.29; small-to-large) from T1 to T2. RPEres-TL was greater than RPEmus-TL for training sessions performed four (M−4: p < 0.001; Cohen’s d = −0.61; moderate) and one (M−1: p = 0.01; Cohen’s d = −0.37; small) days before the match. Baseline sprint performance showed large correlations with the dRM-Index during M−2 (p < 0.05; r < 0.59), M−1 (p < 0.05; r < 0.60) and matches (p < 0.05, r < 0.66). Differential RPE allows the analysis of the TL distribution during the week providing additional insights into the training workload. Baseline sprint performance can be used to forecast the differed heterogeneous individual cardiovascular and neuromuscular responses to the sessions. This initial study on the dRM-Index offers a novel and practical approach to individualize and optimize the training process of youth female soccer players.
REFERENCES (44)
1.
Alexiou, H., & Coutts, A. J. (2008). A comparison of methods used for quantifying internal training load in women soccer players. International Journal of Sports Physiology and Performance, 3(3), 320–330. https://doi.org/10.1123/ijspp.....
2.
Ansdell, P., Thomas, K., Hicks, K. M., Hunter, S. K., Howatson, G., & Goodall, S. (2020). Physiological sex differences affect the integrative response to exercise: acute and chronic implications. Experimental Physiology, 105(12), 2007–2021. https://doi.org/10.1113/EP0885....
3.
Arregui-Martin, M. A., Garcia-Tabar, I., & Gorostiaga, E. M. (2020). Half soccer season induced physical conditioning adaptations in elite youth players. International Journal of Sports Medicine, 41(2), 106–112. https://doi.org/10.1055/A-1014....
4.
Azcárate, U., Yanci, J., & Los Arcos, A. (2018). Influence of match playing time and the length of the between-match microcycle in Spanish professional soccer players’ perceived training load. Science and Medicine in Football, 2(1), 23–28. https://doi.org/10.1080/247339....
5.
Borg, E., Borg, G., Larsson, K., Letzter, M., & Sundblad, B. M. (2010). An index for breathlessness and leg fatigue. Scandinavian Journal of Medicine and Science in Sports, 20(4), 644–650. https://doi.org/10.1111/J.1600....
6.
Borg, G. (1982). Ratings of perceived exertion and heart rates during short-term cycle exercise and their use in a new cycling strength test. International Journal of Sports Medicine, 3(3), 153–158. https://doi.org/10.1055/S-2008....
7.
Bosco, C., Luhtanen, P., & Komi, P. V. (1983). A simple method for measurement of mechanical power in jumping. European Journal of Applied Physiology and Occupational Physiology, 50(2), 273–282. https://doi.org/10.1007/BF0042....
8.
Cohen, J. (1988). Statistical power analysis for the behavioral sciences (2nd ed.). Lawrence Erlbaum Associates.
9.
de Dios-Álvarez, V., Lorenzo-Martínez, M., Padrón-Cabo, A., & Rey, E. (2022). Small-sided games in female soccer players: a systematic review. The Journal of Sports Medicine and Physical Fitness, 62(11), 1474–1480. https://doi.org/10.23736/S0022....
10.
Douchet, T., Paizis, C., Carling, C., & Babault, N. (2024). Influence of a modified versus a typical microcycle periodization on the weekly external loads and match day readiness in elite academy soccer players. Journal of Human Kinetics, 93, 133–144. https://doi.org/10.5114/jhk/18....
11.
Drew, M. K., & Finch, C. F. (2016). The relationship between training load and injury, illness and soreness: a systematic and literature review. Sports Medicine, 46(6), 861–883. https://doi.org/10.1007/S40279....
12.
Dudley, C., Johnston, R., Jones, B., Till, K., Westbrook, H., & Weakley, J. (2023). Methods of monitoring internal and external loads and their relationships with physical qualities, injury, or illness in adolescent athletes: a systematic review and best-evidence synthesis. Sports Medicine, 53(8), 1559–1593. https://doi.org/10.1007/S40279....
13.
Ekblom, B., & Golobarg, A. N. (1971). The influence of physical training and other factors on the subjective rating of perceived exertion. Acta Physiologica Scandinavica, 83(3), 399–406. https://doi.org/10.1111/J.1748....
14.
Elliott-Sale, K. J., Minahan, C. L., de Jonge, X. A. K. J., Ackerman, K. E., Sipilä, S., Constantini, N. W., Lebrun, C. M., & Hackney, A. C. (2021). Methodological considerations for studies in sport and exercise science with women as participants: a working guide for standards of practice for research on women. Sports Medicine, 51(5), 843–861. https://doi.org/10.1007/s40279....
15.
Emmonds, S., Heyward, O., & Jones, B. (2019). The challenge of applying and undertaking research in female sport. Sports Medicine - Open, 5(1), 51. https://doi.org/10.1186/s40798....
16.
Foster, C., Florhaug, J. A., Franklin, J., Gottschall, L., Hrovatin, L. A., Parker, S., Doleshal, P., & Dodge, C. (2001). A new approach to monitoring exercise training. Journal of Strength and Conditioning Research, 15(1), 109–115. https://doi.org/10.1519/001242....
17.
Garcia-Tabar, I., Iturricastillo, A., Castellano, J., Cadore, E. L., Izquierdo, M., & Setuain, I. (2022). Predicting cardiorespiratory fitness in female soccer players: the Basque Female Football Cohort study. International Journal of Sports Physiology and Performance, 17(1), 90–97. https://doi.org/10.1123/IJSPP.....
18.
Gil-Rey, E., Lezaun, A., & Los Arcos, A. (2015). Quantification of the perceived training load and its relationship with changes in physical fitness performance in junior soccer players. Journal of Sports Sciences, 33(20), 2125–2132. https://doi.org/10.1080/026404....
19.
Gonçalves, L., Clemente, F. M., Barrera, J. I., Sarmento, H., Praça, G. M., de Andrade, A. G. P., Figueiredo, A. J., Silva, R., Silva, A. F., & Carral, J. M. C. (2021). Associations between physical status and training load in women soccer players. International Journal of Environmental Research and Public Health, 18(19), 10015. https://doi.org/10.3390/IJERPH....
20.
Hopkins, W. G., Marshall, S. W., Batterham, A. M., & Hanin, J. (2009). Progressive statistics for studies in sports medicine and exercise science. Medicine and Science in Sports and Exercise, 41(1), 3–13. https://doi.org/10.1249/MSS.0B....
21.
Hutchinson, J. C., & Tenenbaum, G. (2006). Perceived effort — Can it be considered gestalt? Psychology of Sport and Exercise, 7(5), 463–476. https://doi.org/10.1016/J.PSYC....
22.
Impellizzeri, F. M., Marcora, S. M., & Coutts, A. J. (2019). Internal and external training load: 15 years on. International Journal of Sports Physiology and Performance, 14(2), 270–273. https://doi.org/10.1123/IJSPP.....
23.
Jaspers, A., Brink, M. S., Probst, S. G. M., Frencken, W. G. P., & Helsen, W. F. (2017). Relationships between training load indicators and training outcomes in professional soccer. Sports Medicine, 47(3), 533–544. https://doi.org/10.1007/s40279....
24.
Jaspers, A., Kuyvenhoven, J. P., Staes, F., Frencken, W. G. P., Helsen, W. F., & Brink, M. S. (2018). Examination of the external and internal load indicators’ association with overuse injuries in professional soccer players. Journal of Science and Medicine in Sport, 21(6), 579–585. https://doi.org/10.1016/j.jsam....
25.
Los Arcos, A., Gonzalez-Artetxe, A., Lombardero, S., Esnal-Arrizabalaga, O., & Aginaga, J. (2025). Exploring the impact of social relationship modification on young female soccer players’ performance in small-sided games. Journal of Human Kinetics, 95, 227–241. https://doi.org/10.5114/jhk/18....
26.
Los Arcos, A., Martínez-Santos, R., Yanci, J., Mendiguchia, J., & Méndez-Villanueva, A. (2015). Negative associations between perceived training load, volume and changes in physical fitness in professional soccer players. Journal of Sports Science and Medicine, 14(2), 394–401. http://www.jssm.org.
27.
Los Arcos, A., Mendez-Villanueva, A., & Martínez-Santos, R. (2017). In-season training periodization of professional soccer players. Biology of Sport, 34(2), 149–155. https://doi.org/10.5114/BIOLSP....
28.
Los Arcos, A., Yanci, J., Mendiguchia, J., & Gorostiaga, E. M. (2014). Rating of muscular and respiratory perceived exertion in professional soccer players. Journal of Strength and Conditioning Research, 28(11), 3280–3288. https://doi.org/10.1519/JSC.00....
29.
Martinho, D. V., Coelho-e-Silva, M. J., Valente-dos-Santos, J., Minderico, C., Oliveira, T. G., Rodrigues, I., Conde, J., Sherar, L. B., & Malina, R. M. (2022). Assessment of skeletal age in youth female soccer players: agreement between Greulich-Pyle and Fels protocols. American Journal of Human Biology, 34(1), e23591. https://doi.org/10.1002/AJHB.2....
30.
Martinho, D. V., Rebelo, A., Field, A., Ribeiro, A. S., Pereira, F., Bizarro, B., Ribeiro, J., Len, S. M., Gouveia, É. R., & Sarmento, H. (2024). The quantification of physical performance and internal training load in youth male soccer players during preseason. International Journal of Sports Physiology and Performance, 19(5), 480–486. https://doi.org/10.1123/IJSPP.....
31.
McKay, A. K. A., Stellingwerff, T., Smith, E. S., Martin, D. T., Mujika, I., Goosey-Tolfrey, V. L., Sheppard, J., & Burke, L. M. (2022). Defining training and performance caliber: a participant classification framework. International Journal of Sports Physiology and Performance, 17(2), 317–331. https://doi.org/10.1123/IJSPP.....
32.
McLaren, S. J., Graham, M., Spears, I. R., & Weston, M. (2016). The sensitivity of differential ratings of perceived exertion as measures of internal load. International Journal of Sports Physiology and Performance, 11(3), 404–406. https://doi.org/10.1123/IJSPP.....
33.
McLaren, S. J., Macpherson, T. W., Coutts, A. J., Hurst, C., Spears, I. R., & Weston, M. (2018). The relationships between internal and external measures of training load and intensity in team sports: a meta-analysis. Sports Medicine, 48(3), 641–658. https://doi.org/10.1007/S40279....
34.
Newans, T., Bellinger, P., Drovandi, C., Buxton, S., & Minahan, C. (2022). The utility of mixed models in sport science: a call for further adoption in longitudinal data sets. International Journal of Sports Physiology and Performance, 17(8), 1289–1295. https://doi.org/10.1123/IJSPP.....
35.
Pandolf, K. B. (1982). Differentiated ratings of perceived exertion during physical exercise. Medicine and Science in Sports and Exercise, 14(5), 397–405.
36.
Romero-Moraleda, B., González-García, J., Morencos, E., Giráldez-Costas, V., Moya, J. M., & Ramirez-Campillo, R. (2023). Internal workload in elite female football players during the whole in-season: starters vs non-starters. Biology of Sport, 40(4), 1107–1115. https://doi.org/10.5114/BIOLSP....
37.
Sandford, G. N., Laursen, P. B., & Buchheit, M. (2021). Anaerobic speed/power reserve and sport performance: scientific basis, current applications and future directions. Sports Medicine, 51(10), 2017–2028. https://doi.org/10.1007/s40279....
38.
Savolainen, E. H. J., Ihalainen, J. K., & Walker, S. (2025). Female soccer players’ in-season weekly training load and intensity: Comparison between national league’s top and bottom-half ranked teams. Journal of Human Kinetics, 95, 187–198. https://doi.org/10.5114/JHK/18....
39.
Silva, J. R., Rumpf, M. C., Hertzog, M., Castagna, C., Farooq, A., Girard, O., & Hader, K. (2018). Acute and residual soccer match-related fatigue: a systematic review and meta-analysis. Sports Medicine, 48(3), 539–583. https://doi.org/10.1007/s40279....
40.
Skalski, D., Prończuk, M., Łosińska, K., Spieszny, M., Kostrzewa, M., Aschenbrenner, P., & Maszczyk, A. (2024). The impact of asymmetry in lower limb muscle strength and power on straight-line running speed in female soccer players. Baltic Journal of Health and Physical Activity, 16(4), Article 6. https://doi.org/10.29359/BJHPA....
41.
Tarnopolsky, L. J., MacDougall, J. D., Atkinson, S. A., Tarnopolsky, M. A., & Sutton, J. R. (1990). Gender differences in substrate for endurance exercise. Journal of Applied Physiology, 68(1), 302–308. https://doi.org/10.1152/JAPPL.....
42.
Tortu, E., Hazir, T., & Kin-Isler, A. (2024). Energy system contributions in repeated sprint tests: Protocol and sex comparison. Journal of Human Kinetics, 92, 87–98. https://doi.org/10.5114/JHK/17....
43.
Whitworth-Turner, C. M., Di Michele, R., Muir, I., Gregson, W., & Drust, B. (2019). Training load and schedule are important determinants of sleep behaviours in youth-soccer players. European Journal of Sport Science, 19(5), 576–584. https://doi.org/10.1080/174613....
44.
Wright, M. D., Songane, F., Emmonds, S., Chesterton, P., Weston, M., & McLaren, S. J. (2020). Differential ratings of perceived match and training exertion in girls’ soccer. International Journal of Sports Physiology and Performance, 15(9), 1315–1323. https://doi.org/10.1123/IJSPP.....
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