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題名 | Knee Isokinetic Strength and Body Fat Analysis in University Students=大專學生之等速肌力與體脂肪分析 |
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作者 | 呂怡靜; 張志仲; 陳惠媚; 林榮豐; 陳順勝; | 書刊名 | The Kaohsiung Journal of Medical Sciences |
卷期 | 16:10 2000.10[民89.10] |
頁次 | 頁517-524 |
分類號 | 528.9013 |
關鍵詞 | 大專學生; 等速肌力; 體脂肪; 人體計則; Isokinetic strength; Anthropometry; Body composition analysis; |
語文 | 英文(English) |
中文摘要 | 研究背景與目的:很多因素會影響肌力的表現,例如人體測量的各種 不同參數。本篇研究目的是研究膝關節等速肌力表現與體脂肪的相關性,以及比 較性別之間的差異。方法:五十八位志願之正常大學學生參與此研究,32位為女 性26位為男性,年齡介於20至25歲。實驗前所有測量方法都先經過再測信度 測試。等速肌力測試測量膝關節彎曲與伸展的肌力,包括兩種角速度(慢速以 60?秒,快速以120?秒) 的測試。身體組成的分析以及多種體態的測量方法有 以生物電子阻抗儀(bioelectrical impedance analysis: BIA)測量體脂肪百分比、 以皮脂厚度測徑器(skinfold caliper)換算體脂肪百分比、以及測量身體質量指 數(body mass index: BMI)和腰臀比。結果:信度分析方面一週後再測信度分 別為:等速肌力測試階級內相關係數(intraclass correlation coefficient: ICC)介於 0.83-0.93、身體組成及其他體態測量方面以BIA 最高(ICC=0.98)。膝關節各種速 度之等速肌力與身體體脂肪百分比及其他各種體態測量均具顯著相關性,但以 BIA測定之體脂肪百分比與肌力之相關性(r 值介於-0.60 和-0.74之間,p<0.001) 與淨瘦肉重(fat free mass)相關性(r 值介於0.64 和0.78之間,p<0.001)較高。 男性與女性不論在肌力的表現方面或身體組成與體態測量方面均有顯著的差 異,但經由統計分析,將共變項(由BIA測得的體脂肪百分比及BMI)控制後, 男性與女性在肌力的表現方面即不具統計性差異。結論:以生物電子阻抗儀測量 體脂肪百分比有較高之信度,與肌力的表現呈現很好的相關,加上其方便性,建 議臨床評估研究可多採用。正常大學學生膝關節等速肌力與體脂肪百分比成顯著 負相關,體脂肪的百分比增加使得淨瘦肉百分比減少因而肌力降低。雖然性別在 等速肌力有顯著不同,主要原因之中可能受體脂肪百分比及BMI的影響,因此 體脂肪的多寡對肌力具重大影響效力,因此值得對各種疾病之肌肉無力患者進一 步研究分析。 |
英文摘要 | Many factors such as anthropometric variables influence strength performance. This study is to determine the relationship between knee isokinetic strength and body composition, and to compare the gender differences. Test-retest reliability had been performed within one week for all measurement methods before the formal study. Fifty-eight 20-25 year-old university students, 32 females and 26 males, participated in this study. Isokinetic strength of the knee flexion and extension was measured at two angular velocities of 60?sec and 120?sec. Body composition was measured by bioelectrical impedance analysis (BIA) and skinfold caliper. The others variables including height, body weight, body mass index (BMI), and waist to hip ratio were measured or calculated. The results showed that the intra-class correlation coefficients for isokinetic knee strength were between 0.83 and 0.93, and body composition and anthropometric variables were between 0.83 and 0.98. Isokinetic knee strength was significantly correlated with body height, body weight, BMI, waist and hip ratio and percent of body fat estimated by skinfold caliper (r = -0.56 to 0.64). The correlation between isokinetic strength with percent of body fat esti-mated by BIA (r = -0.60 to - 0.74; p<0.001) and with fat free mass (r=0.64 to 0.78; p<0.001) was even higher. Although male subjects had significantly greater mean values in body height, body weight, waist to hip ratio and isokinetic strength than female subjects, the MANCOVA showed that the effect of gender on knee isokinetic strength would be eliminated when the covariant variable, the percent of body fat measured by BIA and BMI was controlled in the analysis model. In conclusion, knee isokinetic strength was significantly negatively correlated with proportion of fat and positively correlated with fat free mass. The magnitude of strength difference between males and females could be explained by differences in body fat proportion and BMI in this study. Therapist would take the body fat composition, fat free mass, and BMI into consideration in knee muscle strength measurement. Less body fat and higher BMI will contain more fat free mass that produces more muscle strength. |
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