Isometric quadriceps strength determines sailing performance and neuromuscular fatigue during an upwind sailing emulation

Journal of Sports Sciences
J BourgoisJ Boone

Abstract

This study investigates the physiological responses to upwind sailing on a laser emulation ergometer and analyses the components of the physical profile that determine the physiological responses related to sailing level. Ten male high-level laser sailors performed an upwind sailing test, incremental cycling test and quadriceps strength test. During the upwind sailing test, heart rate (HR), oxygen uptake, ventilation, respiratory exchange ratio, rating of perceived exertion (RPE) and lactate concentration were measured, combined with near-infrared spectroscopy (NIRS) and electromyography (EMG) registration of the M. Vastus lateralis. Repeated measures ANOVA showed for the cardio-respiratory, metabolic and muscles responses (mean power frequency [MPF], root mean square [RMS], deoxy[Hb+Mb]) during the upwind sailing test an initial significant increase followed by a stabilisation, despite a constant increase in RPE. Stepwise regression analysis showed that better sailing level was for 46.5% predicted by lower MPF decrease. Lower MPF decrease was for 57.8% predicted by a higher maximal isometric quadriceps strength. In conclusion, this study indicates that higher sailing level was mainly determined by a lower rate of neuromuscular...Continue Reading

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Citations

Jun 21, 2017·Sports Biomechanics·Bernd FriesenbichlerNicola A Maffiuletti
Mar 21, 2017·European Journal of Sport Science·Jan G BourgoisJan Boone
Dec 11, 2019·International Journal of Environmental Research and Public Health·Israel CaraballoAntonio Alías
Jan 1, 2017·European Journal of Sport Science·R BuchardtN B Nordsborg
Nov 29, 2020·Journal of Sports Sciences·Kilian PhilippeJacques Prioux

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