π Endurance runners are often faced with gastrointestinal (GI) stress, which can result in bloating, abdominal cramping, diarrhoea, nausea, and vomiting. The cause of GI stress during endurance exercise is influenced by several factors including oxygen deficiency in the abdomen, oxidative stress, hyperthermia, exercise-related mechanical stress, and malabsorption of carbohydrates consumed before and during exercise.
Full post: https://www.werunultras.com/endurance-research/probiotics-for-endurance-athletes