Suggest Treatment For Body Stiffness And Muscle Soreness

I am 22 i used to be very athletic as a teenager but now due to academic involvements i am unable to carry out any sports. I have tried body building several times....
I always quit due to Delayed Onset Muscle Soreness. i find my body stiff and cant even move, what can i do so that i can keep going with my workout regularly avoiding the pain and soreness?