You need something with sugar or something that will give energy before working out because then if you don’t eat you will feel weak

Exactly!!

Banana's are high in Potassium
Potassium is an essential nutrient used to maintain fluid and electrolyte balance in the body. It plays a critical role in the transmission of electrical impulses in the heart, muscles, and nervous system.

A deficiency in potassium causes fatigue, irritability, and hypertension/high blood pressure

Also high in Potassium are avocados, kiwifruit, pomegranate, apricots, cherries, and oranges

yay so it was just low sugar?

I got dizzy at the gym once or twice, bananas definitely help, I also started drinking lucozade or other similar energy drinks for the glucose