In this research work, the concept of strengthening technique of proprioceptive neuromuscular facilitation (PNF) incorporated with tendon gliding exercise (TGE) will be used to improve neuromuscular function of upper extremity of patients with diabetes mellitus. The first specific aim of the study is to examine the effects of home-based PNF exercise on the motor, sensation and functional performance parameters of upper extremity of the patients with diabetes mellitus. In addition, whether adding a tendon gliding exercise (TGE) to the home-based PNF exercises can provide better treatment effects for the patients with diabetes mellitus will also been investigated in this study. One of the hypothesis of this study is the prescribing home-based PNF exercise program has a positive treatment effect on neuromuscular function of the upper extremity of patients with diabetes mellitus. And,the other is home-based PNF in conjunction with TGE provides better benefits for neuromuscular function of the upper extremity of patients with diabetes mellitus.