目的：探討工作強化訓練對於上肢損傷職災勞工之握力、捏力和最大負重能力的訓練效果。方法：共有26名上肢損傷職災勞工參加本計畫，其中19人為男性、7人為女性。平均年齡是36.6歲（25~63歲）。從發生上肢損傷到開始接受工作強化訓練的平均時間是277.5天（89~1005天），每天3~6小時，為期3~6週的工作強化訓練，訓練內容主要為強度逐漸增加的各項上肢操作活動。訓練前後分別檢查握力、捏力和最大負重能力，用配對t檢定進行統計分析，檢驗訓練前後是否有差異並以問卷調查瞭解個案接受訓練後復工信心之主觀感受。結果：上肢損傷職災勞工接受工作強化訓練後，雙側手部的握力、捏力和最大負重能力都有明顯進步(p<.001)，並且具有統計學上的意義，經過訓練後，所有個案之能力都能滿足個別的工作需求，85%的個案接受訓練後，認同工作強化訓練使其更有信心返回職場工作。結論：本研究所使用的工作強化方式可以讓上肢損傷的職災勞工得到雙側手部的握力、捏力和最大負重能力等指標性生理能力的改善，符合職務的負重需求，並因此增進職災勞工復工的自信心。

Objective: The purpose of this study is to examine effects of work hardening program on grasp power, pinch power, and strength levels in work related hand injured workers. Materials and Methods: 26 workers with upper extremity work related injury, referred to our work hardening program. 19 were men and 7 were women and the average age was 36.6 years (range 25-63 years) The average elapsed time between onsst and participating in work hardening program was 277.5 days (range 89-1005 days). All participants underwent average of 4 weeks training. The grasp power, pinch power and strength levels were measured before and after training, Paired-t test was used to examine the difference of grasp power, pinch power and strength levels before and afterprogram. Subjective perception of the confidence of return to work was also measured by a simple questionaire after work hardening program. Results: All workers showed significant improvement in bilateral sides grasp power, pinch power and strength levels between before and after traning. All of the difference of bilateral sides grasp power, pinch power and strength levels before and after work hardening are all statistically significant (p<.001). 85% trainees agreed that their confidence level of return to work had improved after participating in this program. Conclusions: Work hardening program in this study improve grasp power, pinch power and strength levels of injured workers. The physical capacity fulfilled the work demand after traing therefor their confidence of return to work increased.