Tesis doctorals (EUSES) http://hdl.handle.net/10256/19366 2025-05-29T05:19:12Z Physical performance and hamstring injury risk factors during the off-season period in footballers: inertial flywheel versus gravity-dependent resistance training methods http://hdl.handle.net/10256/19783 Physical performance and hamstring injury risk factors during the off-season period in footballers: inertial flywheel versus gravity-dependent resistance training methods Vicens Bordas, Jordi The physical demands (high-intensity running and sprinting) of football match-play place footballers at increased risk of hamstring injuries. Some of the negative effects of a hamstring injury such as neuromuscular deficits and a decrease in performance are already known. While previous injury and age are known risk factors for future hamstring injuries, their relationship with the changes in eccentric hamstring strength and performance during the offseason in semi-professional footballers have not been studied. Moreover, a variety of resistance training interventions aiming at improving physical performance and strength are available in the literature, with inertial flywheel resistance training arising lately and providing promising results. The thesis aimed to firstly compare the use of inertial flywheel with gravity-dependent resistance training for improving physical performance and thigh muscle strength and, secondly, to test how previous injury, age and the off-season period affects physical performance and eccentric hamstring strength in semi-professional and amateur footballers; Les demandes condicionals (carreres a alta-intensitat i esprints) dels futbolistes en un partit es relacionen amb un increment del risc de lesions de la musculatura isquiosural. Alguns dels efectes negatius relacionats aquestes lesions són els dèficits neuromusculars i la reducció del rendiment. La història de lesió i l’edat són factors de risc per futures lesions, tot i que la relació amb la força excèntrica i el rendiment durant el període transitori en futbolistes semiprofessionals no s’ha estudiat detalladament. Existeixen diferents mètodes d’entrenament per poder millorar el rendiment i la força, on l’entrenament amb màquines inercials està donant resultats interessants. Els objectius de la tesi són, comparar l’ús de l’entrenament amb màquines inercials amb l’entrenament amb mètodes gravitacionals per la millora del rendiment físic i la força; i avaluar si la lesió prèvia, l’edat i el període transitori afecten el rendiment i la força excèntrica isquiosural en futbolistes semiprofessionals i amateurs 2021-06-16T00:00:00Z Groin problems in male football: beyond the time-loss approach http://hdl.handle.net/10256/19412 Groin problems in male football: beyond the time-loss approach Esteve Caupena, Ernest This Thesis aimed at studying the prevalence and severity and broadening the knowledge of aetiology and risk factors of groin injuries in male football. The four papers, which form part of this Thesis, are based on the same research project conducted on a cohort of amateur players from 17 Spanish teams. Variables such as information about groin pain in the previous season, pre-season short- and long-lever hip adductor squeeze strength, together with demographic and anthropometric data were collected at pre-season. Hip- and groin-related sporting function was registered at baseline, and every fourth week during the in-season, using the Sport and Recreation subscale from The Copenhagen Hip and Groin Outcome Score (HAGOS (Sport)) questionnaire. Time-loss groin injuries, registered by the team physiotherapist, in addition to self-reported groin pain, irrespective of time loss, were registered over 44 weeks to document all groin problems, and groin problems with and without time loss; Aquesta Tesi va tenir com a objectiu l'estudi de la prevalença i la severitat, i l’exemplar coneixement sobre l’etiologia i factors de risc de les lesions de l'engonal en futbolistes. Els quatre articles que formen la tesi estan basats en el mateix projecte de recerca, conduit en una cohort de futbolistes amateurs Espanyols. El dolor inguinal en la temporada passada, la força d'adductors, juntament amb dades demogràfiques i antropomètriques es van recollir a la pre-temporada. La funció esportiva relacionada amb el maluc i l'engonal es va registrar a l'inici de l'estudi i també durant la temporada cada quatre setmanes utilitzant el qüestionari Hip And Groin Outcome Score (HAGOS). Les lesions de l'engonal amb "time-loss", registrades pels fisioterapeutes dels equips, el dolor de l'engonal autoreportat i irrespectiu de "time-loss" es van registrar durant 44 setmanes per documentar tots els problemes de l'engonal, i problemes amb i sense "time-loss" 2020-10-02T00:00:00Z Inter-limb asymmetries and sports performance: from assessment to the application of a sport-specific iso-inertial resistance training in young athletes http://hdl.handle.net/10256/19408 Inter-limb asymmetries and sports performance: from assessment to the application of a sport-specific iso-inertial resistance training in young athletes Madruga Parera, Marc The asymmetries detected in the different multi-directional sports vary in magnitude depending on the test selected. Furthermore, in the individual analysis of the different tests administered, it was observed that athlete’s lower limb preferences depended on the test. Greater asymmetries were detected in the vertical jump test, the CODD variable, and the change of direction with inertial resistance test in multidirectional sports. The change of direction with inertial resistance test also enabled us to detect asymmetries in actions that approximate the actual sport. Moreover, the results showed that asymmetries have a negative impact on performance of the jump and the change of direction, and on speed in the linear sprint and the capacity to repeat the change of direction. Last, we were able to observe that iso-inertial training results in greater adaptations in performance and larger reductions in asymmetries than conventional cable-resistance training. We can also affirm that positive adaptations in performance caused by resistance training are not necessarily associated with reduced asymmetries; Com a síntesis d’aquest procés d’investigació, les asimetries detectades en els diferents esports multidireccionals mostren variabilitat en les magnituds segons la prova seleccionada. A més, en l’anàlisis individuals les proves realitzades, s’ha pogut observar que els esportistes mostren preferències en l’habilitat de la cama en funció de la prova. El test de salt vertical, la variable del COD i canvi de direcció amb resistència iso-inercial mostra majors magnituds en la detecció d’asimetries en esports multidireccionals. El canvi de direcció amb resistència iso-inercial permet, detectar les asimetries en accions pròximes a l’esport. Per un altre costat, els nostres resultats també mostren que les asimetries influeixen negativament en el rendiment de salt, canvi de direcció, capacitat de repetir canvis de direcció i velocitat en esprint lineal. Per a finalitzar, hem pogut observar que l’entrenament iso-inercial provoca majors adaptacions en el rendiment i majors reduccions d’asimetries que l’entrenament de força convencional de cable gravitacional 2020-06-03T00:00:00Z