In a marathon running of 42.195 km, the body is required to efficiently convert carbohydrates into energy. Vitamin B1, which is contained in abundance in Eels, aids in this process.

For this reason, Eels are well known to marathon runners as a good stamina food to consume the night before a marathon. Not only marathons, but why not eat Eels the day before playing sports that require endurance to build up your power?