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Gazzetta Medica Italiana Archivio per le Scienze Mediche 2018 March;177(3):51-6

DOI: 10.23736/S0393-3660.17.03505-7

Copyright © 2017 EDIZIONI MINERVA MEDICA

language: English

Difference in kayak 200-m sprint performance between male and female kayakers: is muscle mass a contributing factor?

Kana TANAKA, Natsumi NAKAMURA, Takashi ABE

National Institute of Fitness and Sports in Kanoya, Kanoya, Kagoshima, Japan


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BACKGROUND: The aim of this study was to examine the relationship between muscle mass and 200-m kayak sprint performance in male and female kayakers.
METHODS: Twelve male and thirteen female Japanese kayakers (aged 19 to 29 years) volunteered for the study. Muscle thickness was measured using B-mode ultrasound on the anterior aspect of the forearm (MT-ulna). Appendicular lean soft tissue mass (aLM) was estimated using a prediction equation (aLM = 4.89 x MT-ulna [cm] x body height [m] - 9.15). Kayaking performance over 200-m (K200 time) was measured under official race conditions at a national qualifying event.
RESULTS: Both aLM and aLM index were inversely correlated with K200 time in male kayakers (r = -0.752, p<0.01 and r = -0.848, p<0.001, respectively). In female kayakers, absolute aLM was inversely correlated with K200 time (r = -0.617, p<0.05), but aLM index tended to be correlated with K200 time (r = -0.500, P=0.08). When the overall sample (n=25) was used, there was a strong correlation between K200 time and both aLM (r = -0.846, p<0.001) and aLM index (r = -0.731, p<0.001). After adjusting for age and arm span, the correlation coefficients were still significant between K200 time and aLM (r = -0.534, p<0.01) or aLM index (r = -0.453, p<0.05).
CONCLUSIONS: Our results suggest that ultrasound-estimated appendicular lean mass may be a major factor contributing to the difference in kayak sprint performance between male and female kayakers.


KEY WORDS: Sex characteristics - Muscle, skeletal - Ultrasonography

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