One food that I have always avoided before running is banana. It may seem as the ideal energy booster (have seen runners eating during a marathon race, some races even provide it) but the one time i tried a banana it gave me stomach cramps.
Avoid Fat before running exercise
But if there is one food that is no no is any foods with a lot of fat. Fats can be very difficult and slow to digest and remain in the stomach a long time. Fatty food also will pull blood into the stomach to aid in digestion, which can cause cramping and discomfort.
Other foods to avoid before running
- Meats (especially red meat)
- Fries/ Potato chips
The rule of thumps is any food that stays long in the stomach and it is hard to digest is best avoided.