The pre-workout period and the post-workout period are as important as the whole workout process. A good caution during these phases can fetch the desired results for the effort that you put in.
During the pre-workout phase, it is advised to be away from the dairy products. The lactose-rich dairy products such as milk and cheese could lead to intestinal cramping since you are working out.
So it’s better to keep products like milk aside before the workout session despite them being healthy.