目的：探討籃球選手於訓練與比賽中，投籃表現是否因防守壓力而影響出手動作，提供實戰訓練情境之依據，提升投籃動作之穩定度。方法：招募15位健康的男性大專籃球選手自願參與實驗 (年齡：19.3 ± 0.7歲；身高：178.6 ± 7.4公分；體重：77.3 ± 13.3公斤)，以SONY高速攝影機拍攝矢狀面投籃動作 (120 Hz)，以Kwon 3D軟體分析動作時間、身高標準化之出手高度、球體出手位置與角度、足底離地高度，以相依樣本t-test分析訓練與模擬比賽之動作差異，顯著水準設α =.05。結果：模擬比賽情境投籃時，出手高度比值為1.40 ± 3.91 % 顯著大於訓練時的1.33 ± 2.79 % (p = .030, ES= 0.61)；出手速度於模擬比賽時為9.97 ± 0.37 m/s 顯著大於訓練時的9.71 ± 0.26 m/s (p = .019, ES = 0.68)；離地高度於模擬比賽時為14.9 ± 9.05 顯著大於訓練時的5.74 ± 4.56 cm (p = .004, ES= 0.89)；球體發射角於模擬比賽時為52.3 ± 2.97 deg 顯著大於訓練時的49.9 ± 2.07 deg (p = .013, ES= 0.73)。動作時間以及球體出手位置與角度未達顯著差異。結論：模擬比賽情境因防守壓力，選手會增加出手與離地高度，尋求更高的出手點，經由調整投籃動作以降低投球被封蓋的情形，建議於訓練時以模擬防守的方式訓練選手，減少因比賽情境造成動作的不同而影響進球。

Purpose: Exploring whether basketball players’ shooting performance is affected by defensive pressure during training and competition, providing a basis for practical training scenarios, and improving the stability of shooting movements. Methods: Fifteen healthy male college basketball players were recruited to participate in the experiment (age: 19.3 ± 0.7 years; height: 178.6 ± 7.4 cm; weight: 77.3 ± 13.3 kg), the sagittal shooting action was captured with a SONY high-speed camera, and the kinematic parameters were analyzed by Kwon 3D software, including the action time, the height of the shot calculated in proportion to height, the position and angle of the ball shot, and the height of the soles of the feet above the ground, and the difference between the movements of the training and the simulated competition was analyzed through the dependent sample t-test, and the significant level was set at α =.05. Results: When shooting in simulated game scenarios, the shooting height ratio of 1.40 ± 3.91 % was significantly greater than that of 1.33 ± 2.79 % during training (p = .030, ES= 0.61); The shooting speed was 9.97 ± 0.37 m/s in simulated competition, which was significantly greater than 9.71 ± 0.26 m/s in training (p = .019, ES= 0.68); The height of the soles was 14.9 ± 9.05 in simulated competition, significantly greater than 5.74 ± 4.56 cm in training (p = .004, ES= 0.89); The sphere emission angle was 52.3 ± 2.97 deg in simulated competition, which was significantly greater than 49.9 ± 2.07 deg in training (p = .013, ES= 0.73). There were no significant differences found in action time and the position and angle of the ball shot. Conclusion: Due to defensive pressure in simulated competition scenarios, players will increase the height of the shot and height of the soles above ground to seek a higher shooting point, and adjust shooting movement to avoid being blocked. It is recommended to train the player in a simulated defensive method during training, to decrease the chances of inconsistency of shooting movement compromised due to competition scenarios.