跑步機是研究、健身或訓練時常用的儀器，雖然在速度及坡度的控制上有其方便 性，但在研究時卻可能是實驗誤差的主要來源之一。近幾年來，使用跑步機為實驗儀器的研 究不在少數，然而對其信效度提出討論者，卻是少之又少。本實驗以角度計、自動計時碼表 及高速攝影機（ 120Hz ）為實驗儀器， 對兩款不同功能的跑步機（ Trackmaster ）， TM1500 型與 Star Trac 牌，2000 型）之速度與斜度的準確性作一探討， 前由此發展出一 個較為客觀的校正方法。 實驗之受試者為一健康男性（身高 178 公分，體重 85 公斤）在 兩型跑步機上以不同速度及不同坡度測試。結果顯示如下：一、Trackmaster 牌跑步機在平 均速度的誤差可以控制在 2% 之內，故在速度方面可用以作為實驗用的跑步機，然而在斜度 控制的誤差方面則達到 5%， 如此的誤差已達顯著水準，故若欲以此跑步機做含斜度的精密 實驗時，最好先經過校正後再使用。二、Star Trac 牌跑步機在平均速度之誤差方面，無負 荷時為 1.61% 至 6.23%， 而在有負荷時為 2.44% 至 4.36%； 在斜度的誤差方面最大高達 20%， 如此的誤差並不適合當作實驗用的跑步機，除非在使用前已針對所欲使用的範圍已做 過校正。 三、在瞬時速度方面，Trackmaster 牌跑步機的瞬時調藏整雖較 Star Trac 牌跑 步機為佳，然而 30m/sec �揪瑰�時加速度，可能使得跑者足部受到 5000N 以上的瞬時剪力 ，這樣的剪力是否會造成跑者足部的傷害則有待更進一步的研究。

　　　　　The treadmill is often used in health; physiological, biomechanical and athletic training related research. Despite its convenience in speed and slope control, it may be one of the major error sources. Among the researches that used treadmill, only a few had discussed the reliability of the apparatus. The present study used two different types of treadmill (Trackmaster, TM500; Star Trac, 2000) to examine the speed and slope adjustment accuracy. The goniometer, automatic timer, and a highspeed camera (120 Hz) were used to measure the accuracy objectively. One healthy male subject (178 cm, 85 kg) was tested on three different speeds and two different slopes. The results indicated that: 1. The Trackmaster can control the average speed error within 2%, whereas the error of slope was up to 5%. This means if slope is the test protocol, calibration should be taken before hand. 2. The Star Trac (model 2000) had an average speed range from 1.61% to 6.23% without load and 2.44% to 4.36% with load. The error of slope was as high as 20%. The results indicate a general-purpose treadmill can ' t fulfill the demand of an experiment. 3. The Trackmaster demonstrate better adjustment from the instant speed results, but the 30m/sec2 instant acceleration could cause a shearing force of 5000 N. Whether this is a potential injury sources needs further investigation.