目的：探討軟式網球選手體能特徵因子指標。方法：以 43 名高中男子軟式網球選手為 受試者，設計 17 項體能測驗，依受試者地域性之不同編排 2 梯次施測之，以主成份分析之 最大變異法進行統計考驗 (α=.05) 。結果：萃取出 6 個因素構面，且能涵蓋 17 項體能測驗 項目，2 次施測結果的總體內部一致性皆達到.76，重測信度皆在.81 以上 (p<.05)， Kaiser-Meyer-Olkin (KMO) 取樣適切性量數為.75，Bartlett 球形檢定值為 400.79 (p<.05) 。 6 個構面中，因素一為 2 項肌力測驗、3 項爆發力測驗所組成（變異量 18.54% / 共同性 0.85）； 因素二為 3 項敏捷測驗與 1 項下肢肌力測驗所組成 (18.01% / 0.84) ；因素三為 2 項握力測 驗所組成 (13.31% / 0.80) ；因素四為 2 項肌耐力測驗所組成 (11.83% / 0.75) ；因素五僅有 1 項跳繩測驗 (8.45% / 0.77) ；因素六則包含 2 項柔軟度與 1 項腰部轉體能力的測驗 (8.19% / 0.75) ；共有 78.32%的累積變異量。結論：本研究發現軟式網球選手的體能因子之特徵， 係由「瞬發力量」、「敏捷」、「握力」、「肌耐力」、「跳繩」、「柔韌性」等 6 項測驗指標所組 成。此 6 項指標能更清楚軟式網球選手的體能特徵，可作為日後訓練策略調整的參考指標。

Purposes: To investigate the conditioning characteristic of soft tennis (ST) players. Methods: The volunteers were the male high school ST players (n=43). Seventeen conditioning test items were tested in 2 echelons. The principal component analysis were used to analyze the data (α=.05). Results: Out of the 17 conditioning indicators, six facets are extracted which cover 17 of the indicators, the twice of internal consistence was .76, the test-retest reliability was at least .81 (p<.05), the Kaiser-Meyer-Olkin (KMO) measure of sampling adequacy was .75, the Bartlett’s sphericity test was 400.79 (p<.05). Six factors, accounted for the variation by 78.32%, were obtained. The factor one included two muscular strength tests and three power tests (pct of variation by 18.54% / communality by 0.85). The factor two included three agility tests and one lower legs strength tests (18.01% / 0.84). The factor three included two grip strength tests (13.31% / 0.80). The factor four included 2 muscular endurance tests (11.83% / 0.75). The factor five included only rope skipping test (8.45% / 0.77). The factor six included 2 flexibility and 1 body turn fast capacity test more than others (8.19% / 0.75). Conclusions: The conditioning characteristic of ST players composed with 6 indicators of “explosive strength”, “agility”, “grip strength”, “muscular endurance”, “rope skipping” and “flexibility”, they make conditioning characteristic of ST more clearly, can be used as an important reference for in-game strategy adjustment or training.