期刊
JOURNAL OF STRENGTH AND CONDITIONING RESEARCH
卷 26, 期 7, 页码 1799-1804出版社
LIPPINCOTT WILLIAMS & WILKINS
DOI: 10.1519/JSC.0b013e318237e8da
关键词
bone mineral density; muscle mass; fat mass; sex; crosscountry skiing; alpine skiing; adolescents
资金
- Vasterbotten County Council, Umea University, Umea, Sweden
Hogstrom, GM, Pietila, T, Nordstrom, P, and Nordstrom, A. Body composition and performance: influence of sport and gender among adolescents. J Strength Cond Res 26(7): 1799-1804, 2012-Body composition is well known to be associated with endurance performance among adult skiers; however, the association among adolescent crosscountry and alpine skiers is inadequately explored. The study sample comprised 145 male and female adolescent subjects (aged 15-17 years), including 48 crosscountry skiers, 33 alpine skiers, and 68 control subjects. Body composition (%body fat [BF], %lean mass [LM], bone mineral density [grams per centimeter squared]) was measured with a dual-emission x-ray absorptiometer, and pulse and oxygen uptake was measured at 3 break points during incremental performance tests to determine physical fitness levels. Female crosscountry and alpine skiers were found to have significantly higher %LM (mean difference = 7.7%, p < 0.001) and lower %BF (mean difference = 8.1%, p < 0.001) than did female control subjects. Male crosscountry skiers were found to have lower %BF (mean difference = 3.2%, p < 0.05) and higher %LM (mean difference = 3.3%, p < 0.01) than did male alpine skiers and higher %LM (mean difference = 3.7%, p < 0.05) and %BF (mean difference = 3.2%, p < 0.05) than did controls. This study found strong associations between %LM and the onset of blood lactate accumulation and (V) over dotO(2)max weight adjusted thresholds among both genders of the crosscountry skiing cohort (r = 0.47-0.67, p < 0.05) and the female alpine-skiing cohort (r = 0.77-0.79, p < 0.001 for all). This study suggests that body composition is associated with physical performance amongst adolescents.
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