Question

What can exercising right after eating do to you body?

Answer 1

Possible cramping from digesting while exercising.
May fatigue faster since your body uses a decent amount of energy to digest. This combined with exercise is sure to slow you down a touch.
Other than that I don't think there are many negatives. I eat an hour before I exercise, and I exercise for about an hour and fifteen.

Answer 2

Exercising Fasted Increases Your Body's Ability to Use Fat for Fuel. Your body's primary sources of fuel are body fat and carbohydrates. Fat is stored as triglycerides in fat tissue, while carbs are stored in your muscles and liver as a molecule called glycogen. Carbs are also available in the form of blood sugar.