NCSF Sport Nutrition Specialist Certification Practice Test – Complete Exam Prep

The activity that is associated with the highest risk for gastrointestinal (GI) issues during endurance events is running. This is primarily due to the mechanics of running, which involves repetitive jarring of the body and the displacement of blood flow away from the gastrointestinal tract as the body prioritizes blood flow to the muscles and skin during intense exercise. This can lead to symptoms like cramping, nausea, and even the urge to defecate for many runners.

Furthermore, the likelihood of GI issues increases with the duration and intensity of the run, especially for long-distance events such as marathons. Runners often consume carbohydrate-rich gels or drinks to maintain energy levels, which can further upset the digestive system if not tolerated well.

In contrast, while cyclists, swimmers, and rowers may also experience some GI discomfort, the specific physical demands and physiological responses associated with running create a unique environment that amplifies the risk of gastrointestinal problems during endurance performance. This distinction is important for athletes to consider when preparing for and during their training and competitive events.