Artículos

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https://hdl.handle.net/20.500.14340/1317

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Examinando Artículos por Materia "ENTRENAMIENTO DEPORTIVO"

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    Implementing resisted and unresisted sprint training across multiple sports : practical guidelines and considerations
    (Wroclaw University of Health and Sport Sciences, Polonia, 2025) Zabaloy, Santiago; Pereira, Lucas Adriano; Drozd, Miłosz; Loturco, Ireneu
    Given the critical importance of sprinting, particularly its role in performance enhancement (e.g., acceleration capacity and maximal sprint speed during decisive actions) and injury prevention (e.g., hamstring protection), this article provides an up-to-date, informed perspective on the topic. To improve sprint performance, coaches and practitioners commonly employ a variety of training strategies, including “unresisted sprint training” (UST; i.e., a primary training method that directly replicates sprinting technique, such as a traditional sprint effort) and “resisted sprint training” (RST; i.e., a secondary training method involving, for example, sprint drills executed with added resistance, thereby modifying sprinting technique). Although both approaches have shown promising results, the optimal loading magnitude for applying RST remains a topic of debate, especially when using sled-towing or weighted vests. Nevertheless, enhancing sprint performance continues to represent a fundamental objective in athletic development, and training methodologies should be strategically planned through appropriate load management and intensity guidelines to elicit the specific adaptations required to optimise performance across distinct individual and team sport contexts. This narrative review and perspective article aims to provide practitioners with a critical analysis of the current evidence on the acute and chronic effects of UST and RST using sled-towing and weighted vests in elite athletes from different sports, together with practical recommendations (e.g., load prescription schemes, sprint distance adjustments, and recovery interval management) to optimise sprint performance.
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    Artículo
    A randomized controlled trial of unresisted vs. heavy resisted sprint training programs : Effects on strength, jump, unresisted and resisted sprint performance in youth rugby union players
    (Termedia, 2025) Zabaloy, Carlos Santiago; Healy, Robin; Pereira, Lucas A.; Tondelli, Eduardo; Tomaghelli, Luciano; Aparicio, Juan; Vega, Franco; Medrano, Joaquín; Giráldez, Julián; Comyns, Thomas; Freitas, Tomás T.; Loturco, Irineu
    This study aimed to compare: 1) the effects of a 4-week unresisted vs. resisted sprint training programs (UST and RST with 50% body mass, respectively) on both resisted and unresisted sprint performance; and 2) the effects of these sprint training schemes on various strength-power measures (i.e., one-repetition maximum [1RM] and the isometric squat test (ISqT), eccentric hamstring strength in the Nordic hamstring exercise [NHE], and vertical and horizontal jump distances). Thirty-five under-19 male academy rugby players participated in the study and were randomly assigned to one of the two training groups. Players’ unresisted and resisted (50% BM) 30-m sprint performance, squat 1RM, ISqT, NHE, and jump capabilities were tested on different occasions. Only UST produced a significant reduction in unresisted 30-m sprint time (p < 0.05), whereas both groups exhibited significant changes in resisted sprint times at 10 m and 30 m, as well as maximum velocity (p < 0.005; ES: large). Regarding strength measures, RST led to significant increases in ISqT peak force, horizontal jump distance, and NHE strength (p < 0.011; ES: large). Overall, no significant differences were detected between UST and RST in any of the primary or secondary measures after the intervention. Both training methods were equally effective in improving resisted sprint performance in youth male rugby players. Moreover, UST and RST could be effective options for maintaining or even improving various neuromuscular measures (e.g., dynamic-explosive, isometric, and eccentric strength) when lower limb resistance training is reduced during the competitive season due to the congested schedule.