Trunk Flexion to Extension Strength Ratio of 11- to 18- Year Old Youth Ski Racers: Data from 15 Years of Talent Development in Austria  

作　　者：Lisa Steidl-Muller Carson Patterson Roland Luchner Christoph Ebenbichler Carolin Hildebrandt Christian Raschner 

机构地区：[1]Department of Sport Science,University of Innsbruck,Innsbruck,Austria

出　　处：《Journal of Science in Sport and Exercise》2021年第3期I0001-I0009,共9页体育运动科学（英文）

摘　　要：Purpose The aim of the present study was to evaluate the trunk strength capacity of alpine ski racers aged 10-18 years,who were tested during the last 15 years,to identify reference values for trunk flexor to extensor strength ratios according to age and sex.Methods In total,2841 participants(1605 males,1236 females;10-18 years)were included,who were pupils of a famous skiing-specific secondary modern school or members of the provincial ski team between 2006 and 2020.The maximum isometric trunk flexion and extension strength was measured using the slightly modified Back Check.Sex-specific differ-ences were assessed with Student’s t test or Mann-Whitney-U test.Univariate analyses of variance or Kruskal-Wallis-H tests were used to assess differences between age groups.Descriptive sex-and age-specific reference values were calculated(norm area:mean±½standard deviation).Results Sex-specific differences were found for both flexion(starting at 11 years)and extension strength(starting at 12 years)(P<0.001).Lower flexion to extension strength ratios were identified for males(0.89±0.18)compared with females(0.82±0.15),but the ratios remained constant across age groups for both sexes.Conclusion The present study provides age-and sex-specific reference values for trunk flexion to extension strength ratios for 10-to 18-year old youth and adolescent ski racers.The data of the present study represent a large data pool of youth ski racers at a high-performance level;thus,coaches can use the reference values for comparing the ratios of their athletes.

关 键 词：Core strength Youth athletes Alpine ski racing Talent development 

分 类 号：G863.1[文化科学—体育训练]