I have many bad habbits but one is Cherry Pepsi. Does anyone know the effects soda has on our workouts? and body?

Well, the Cherry Pepsi (assuming it's full calorie) will have about 150 calories in a 12 oz can. That's a lot of empty calories. It also has caffeine so you'll have to drink a significant amount of water to make up for the diuretic effect that it has. I think the rule of thumb is twice as much water as the caffeinated drink (if you drink 12 oz of pepsi, drink 24 oz of water).

Besides a high calorie count it has loads of sugar. Sugar increase the blood sugar level which increases insulin output which returns a fast, sharp decrease in blood glucose into cells which results in feeling hungry, tired, craving more food and the cycle starts all over.