This question is about Cycling
Research suggests that it is better to eat before a bike ride rather than after. Post-ride nutrition is important for recovery, but not being adequately fueled for a long or strenuous ride can hinder performance and training capacity and potentially be dangerous for the rider [ 1 2
Here are some instances where you should consider eating before a bike ride:
Morning rides following an overnight fast
Longer rides lasting >60 minutes
High-intensity rides lasting >45 minutes
If you’re focused more on general health or weight loss than cycling performance, eating before a bike ride isn’t always necessary. If your last meal was within 2-3 hours, you can probably skip the snack before moderate-intensity rides lasting less than 60 minutes.
Kerksick, C. M., Wilborn, C. D., Roberts, M. D., Smith-Ryan, A., Kleiner, S. M., Jäger, R., Collins, R., Cooke, M., Davis, J. N., Galvan, E., Greenwood, M., Lowery, L. M., Wildman, R., Antonio, J., & Kreider, R. B. (2018). ISSN exercise & sports nutrition review update: research & recommendations. Journal of the International Society of Sports Nutrition, 15(1), 38. https://doi.org/10.1186/s12970-018-0242-y
Jeukendrup A. (2014). A step towards personalized sports nutrition: carbohydrate intake during exercise. Sports medicine (Auckland, N.Z.), 44 Suppl 1(Suppl 1), S25–S33. https://doi.org/10.1007/s40279-014-0148-z