Mechanics and Energetic Analysis of Rowing with Big Blades with Randall Foils.

Autor:	Cardoso R; Centre of Research, Education, Innovation and Intervention in Sport, Faculty of Sport, University of Porto, Porto, Portugal.; Porto Biomechanics Laboratory, Faculty of Sport, University of Porto, Porto, Portugal., Rios M; Centre of Research, Education, Innovation and Intervention in Sport, Faculty of Sport, University of Porto, Porto, Portugal.; Porto Biomechanics Laboratory, Faculty of Sport, University of Porto, Porto, Portugal., Carvalho D; Centre of Research, Education, Innovation and Intervention in Sport, Faculty of Sport, University of Porto, Porto, Portugal.; Porto Biomechanics Laboratory, Faculty of Sport, University of Porto, Porto, Portugal., Monteiro AS; Centre of Research, Education, Innovation and Intervention in Sport, Faculty of Sport, University of Porto, Porto, Portugal.; Porto Biomechanics Laboratory, Faculty of Sport, University of Porto, Porto, Portugal., Soares S; Centre of Research, Education, Innovation and Intervention in Sport, Faculty of Sport, University of Porto, Porto, Portugal.; Porto Biomechanics Laboratory, Faculty of Sport, University of Porto, Porto, Portugal., Abraldes JA; Faculty of Sports Sciences, Movement Sciences and Sport, University of Murcia, Murcia, Spain., Gomes BB; Faculty of Sport Sciences and Physical Education, University of Coimbra, Portugal., Vilas-Boas JP; Centre of Research, Education, Innovation and Intervention in Sport, Faculty of Sport, University of Porto, Porto, Portugal.; Porto Biomechanics Laboratory, Faculty of Sport, University of Porto, Porto, Portugal., Fernandes RJ; Centre of Research, Education, Innovation and Intervention in Sport, Faculty of Sport, University of Porto, Porto, Portugal.; Porto Biomechanics Laboratory, Faculty of Sport, University of Porto, Porto, Portugal.
Jazyk:	angličtina
Zdroj:	International journal of sports medicine [Int J Sports Med] 2023 Dec; Vol. 44 (14), pp. 1043-1048. Date of Electronic Publication: 2022 Nov 30.
DOI:	10.1055/a-1990-9787
Abstrakt:	Empirical observations support that the addition of a plastic strip - also known as Randall foils - on the top edge of a rowing blade improves rowing efficiency during the cycle propulsive phase. The aim of the current study was to analyze the effect of using big blades with and without Randall foils on rowing performance. Twenty experienced rowers performed two 90 s tethered rowing bouts (with and without Randall foils) to assess their impact on force production and physiologic variables. All tests were randomized and a repeated measure design was used to compare experimental conditions. Higher values of peak and mean peak forces (479.4±134.7 vs. 423.2±153.0, d =0.83 and 376.5±101.4 vs. 337.1±113.3 N, d =0.68), peak oxygen uptake (47.9±7.5 vs. 45.3±7.3 mL∙kg -1 ∙min -1 , d =0.19), peak blood lactate concentration (7.9±1.6 vs. 6.9±1.7 mmol∙L -1 , d =0.16), blood lactate increasing speed (0.08±0.01 vs. 0.07±0.06 [(mmol·L -1 )·s -1 ], d =0.27) and lactic anaerobic energy (27.4±7.9 vs. 23.4±8.1 kJ, d =0.23) were found for big blades with vs. without Randall foils, p<0.05. The current data suggest that the Randall foils can positively affect rowing performance. Competing Interests: The authors declare that they have no conflict of interest. (Thieme. All rights reserved.)
Databáze:	MEDLINE
Externí odkaz:	Zobrazit plný text záznamu