This question is about Running
A good breakfast for runners should consist mostly of carbohydrates and protein, though portion sizes and amounts will depend on if breakfast is consumed before or after running, and training intensity [ 2 1
Tiwari, U., & Cummins, E. (2011). Meta-analysis of the effect of β-glucan intake on blood cholesterol and glucose levels. Nutrition (Burbank, Los Angeles County, Calif.), 27(10), 1008–1016. https://doi.org/10.1016/j.nut.2010.11.006