The first barrier for delivering exogenous carbohydrate and fluids to the blood and ultimately the contracting muscles is the stomach. This Sports Science Exchange article will provide a brief overview of the evidence suggesting that the GI system can adapt to nutritional training and discuss how this knowledge might be used in practice. This training is sometimes referred to as “training the gut” and has received relatively little attention in the literature. It is clear that the intestinal tract is a highly adaptable organ and it has been suggested that targeted training of the intestinal tract may improve the delivery of nutrients during exercise, while at the same time alleviating some (or all) of the symptoms of GI distress (Jeukendrup & McLaughlin, 2011). Without a well-functioning GI system, delivery of nutrients will be impaired and a range of GI symptoms may develop. In addition, GI symptoms such as bloating, cramping, diarrhea and vomiting are common in many sports, especially in endurance sports (de Oliveira et al., 2014). Especially during prolonged exercise, the supply of exogenous fluid and carbohydrates sources can be critical to performance (Jeukendrup, 2011).
GIT IT SPORTS NUTRITION HOW TO
A lot of time is spent on thinking about how to prepare skeletal muscles for competition, whereas little or no time is spent thinking about conditioning the GI tract. The importance of the GI tract is often underestimated by athletes. The functioning of the gastrointestinal (GI) tract can have a major effect on endurance performance and there are two main reasons for this, 1) the GI tract is responsible for delivering carbohydrate and fluid to the blood during prolonged exercise and it has been demonstrated that the delivery of fluids and carbohydrate can delay fatigue and enhance endurance performance, and 2) there is a high incidence of Gl problems in athletes participating in endurance events, suggesting that GI function may be compromised in some athletes in those conditions.
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