本研究之主要目的，在探討棒球投手的體格測量特質、基本運動能力、投球技能與投球速度的相關性，並預測投球速度的能力。研究對象以國立台灣大學三年級棒球組男生（均為初學棒球投手）共106名，以體格測量特質、基本運動能力和投球技能等之公認的測量方法取得資料；另以雷達測速鎗測得投球速度的資料，所得資料應用相關分析，以了解上述諸變數間的相關情形，並進一步以逐步迴歸分析，選擇預測投球速度之代表測驗。經分析討論後，獲得下列的結論：一、本研究所作的假設，獲得證實的主要部份如下：（一）基本運動能力各變數中大多數變數和投球技能各變數與投球速度有顯著的相關 1.基本運動能力各變數與投球速度的相關：垂直跳高、立定跳遠、左手握力與投球速度有顯著的相關(p<.05)；折返跑、背肌力與投球速度有顯著的相關(p<.01)；五十尺跑、右手握力、引體向上與投球速度有顯著的相關(p<.001)。 2.投球技能各變數與投球速度的相關：棒球擲遠和投球命中率與投球速度有顯著的相關(p<.001)。（二）體格測量特質各變數與投球速度無顯著的相關(p>.05)。二、由逐步迴歸分析之結果顯示，依序棒球擲遠、投球命中率、五十公尺跑和手掌長等四個變數對投球速度之預測有特別的效果。由此四個變數預測投球速度的迴歸方程式為：（一）以標準分數的形式表示Zc=0.658726Z18+0.176751Z19-0.150656Z9+0.118241Z5 （二）以原始分數的形式表示 Xc=0.762637X18+0.120865X19-3.910578X9+1.329465X5+48.729946 其估計標準誤為6.02439，複相關係數R=0.83610，R^2=0.69906，(平均值)R^2=0.68714，F=58.65393，P<.001｡

The purposes of the study were to (1) research the correlations between mamimum pitching velocity and his physique measurements, basic physical ability and pitching skills; (2) select the representative tests of maximum pitching velocity in the predictors mentioned above. One hundred and six male university students served as the subjeats in this investigation. The datas obtained from testing or measuring were analyzed by correlational analysis to know the correlativities in the variables. Furthermore, the stepwise multiple regression was applied to select the representative tests of maximum pitching velocity. The author obtained the following results: 1. The confirmed hypotheses are as follows (1)The most variables of basic physical ability and the whole variables of pitching skills have a significant correlation on the maximum pitching velocity ① On basic physical ability Significant correlation (P<.05) was found between maximum pitching velocity and sargent jump, standing long jump and left hand grips. Significant correlation (P<.01) was also found between maximum pitching velocity and shuttle run and back lift. Significant correlation (P<.001) was also observed between maximum pitching velocity and 50m spring , right hand grips and pull ups. ② On pitching skills Significant correlation (P<.001) was found between maximum pitching velocity and baseball throw for distance and ability to throw at a target. (2)The whole Variables of physique measurements don't have a significant correlation on maximum pitching velocity (P>.05) 2. According to the stepwise multiple regression four items were selected. They are as follow in order: (1) baseball throw for distance (2) ability to throw at a target (3) 50 m sprint (4) length of hand If we use the four selected tests, a multiple regression equation computed for the criterion in the standard score unite is as follow: Zc=0.658726Z18+0.176751Z19-0.150656Z9+0.118241Z5 The equation may also be computed in raw score unites Xc=0.762637X18+0.120865X19-3.910578X9+1.329465X5+48.729946 and the Sc‧18,19,9,5=6.02439; R=0.83610 ((average)R^2=0.69906); R^2=0.68714, F=58.65393, P<.001.