Is it possible to cure high blood sugar problem using diet & exercise only, and avoiding medicines?

PVR asked: I’m 38 years old, Male, Govt. EDP Staff. My Fasting Blood sugar on 10/6/08 is 187, and randomg BS is 231. I want to avoid taking medicines. Instead using diet and exercise only, i want to control my blood sugar levels. Is it possible?
Presently, i’m walking for nearly 5.5 KM / [...]