背景：網球運動主要仰賴無氧系統供能，高大、結實的體型較具發展無氧動力的優勢，且經常從事爆發力型的運動可提升骨質密度。然而，目前國內仍缺乏國內大專甲組優秀網球選手的人體型態測量、無氧運動能力測試以及骨質密度的研究。目的：了解國內大專甲組優秀網球選手的身體型態、無氧動力以及骨質密度的情形。方法：以大專甲組網球選手爲受試者，男性17名（平均年齡20.47±1.50歲）、女性7名（平均年齡19.71±0.76歲），平均訓練年數爲9.62±1.74年。本研究以Inbody 2.0身體組成分析儀測量選手身體組成；以Wingate 30秒腳踏車無氧動力測驗評估選手之無氧動力，以及利用骨質定量超音波儀測量選手右腳跟骨。結果：男性與女性選手之各項生理數值分別爲：身體質量指數（公斤∕平方公尺）：24.14±2.74vs.22.80±2.64；體脂肪率(%)：17.42±4.36vs.26.33±4.46；最高無氧動力(watt/kg)：11.47±2.61vs.7.80±1.88，平均動力(watt/kg)：8.81±1.50vs.6.16±1.67；骨硬度指數：119.35±16.50vs.119.43±16.70。結論：與過去針對國外相同層級之網球選手的研究相較下，本研究結果顯示國內大專甲組優秀網球選手身材略顯矮小、體脂肪率較高，女性大專甲組優秀選手無氧動力較低。然而，國內大專甲組優秀網球選手的骨質密度與國外所提及之優秀選手數值相近。我們建議大專甲組優秀網球選手可降低體脂肪，此外，女性選手可多強化無氧動力的訓練，以更裨益運動表現。

Background: Tennis sport is mainly energized by anaerobic system. People who are tall and muscular in stature have the advantages of developing anaerobic power. Additionally, people who usually perform dynamic exercise will enhance bone mineral density. There is scant research on examining the anthropometric profiles, anaerobic power capacities and bone mineral density in elite division I college tennis athletes in Taiwan. Purpose: This study was to understand the anthropometric profiles, anaerobic power capacities and bone mineral density of the elite division Ⅰ college tennis athletes in Taiwan. Method: Subjects were college division Ⅰ tennis athletes composed of 17 males (mean age 20.47±1.50 yr) and 7 females (mean age 19.71±0.76 yr) who have trained for 9.62±1.74 yr on average. The InBody 2.0 body composition analyzer was used to estimate athletes' body composition; Wingate anaerobic 30s sprint test was employed to determine athletes' anaerobic power capacity; Ultrasound bone densitometer instrument was used to measure the right calcaneus of the athletes. Results: Various parameters for male versus female athletes were: BMI (kg/m^2): 24.14±2.74 vs. 22.80±2.64; body fat (%): 17.42±4.36 vs. 26.33±4.46; peak anaerobic power (watt/kg): 11.47±2.61 vs. 7.80±1.88; average power (watt/kg): 8.81±1.50 vs. 6.16±1.67; stiffness index: 119.35± 16.50 vs. 119.43±16.70. Conclusion: Compared with the previous studies on the foreign tennis athletes in the similar level, the results suggest that elite division Ⅰ college tennis athletes in Taiwan were slightly smaller in stature and having higher levels of percentage body fat, as well as elite division Ⅰ female tennis athletes showed lower anaerobic power level. However, the bone mineral density of the elite division Ⅰ college tennis athletes was similar to the foreign elite athletes' values that were previously reported. We suggested that the elite division Ⅰ college tennis athletes reduce body fat. Additionally, female athletes should place more emphasis on anaerobic power training to enhance their performance.