Sucrose
Also known as table sugar, this dissacharide is derived from plants like sugarcane (labels may read dried cane syrup). It's also what you'll get from brownies or cookies (though we're not condoning munching on those before an intense gym visit).
Sucrose breaks down into equal parts glucose and fructose in the small intestine, where these simple sugars are eventually absorbed through the intestinal wall. It then gets into the bloodstream, where a protein takes the glucose to muscle cells to use for energy or store for later use