What Not to Eat Before Your IRONMAN: A Guide to Race-Day Nutrition Flops
                                
                                
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                                    4 min read                                
                            
                                Up to 90% of endurance athletes experience some form of gastrointestinal distress during competition, a phenomenon often caused by poor pre-race nutrition. For IRONMAN athletes, whose performance is heavily dependent on a finely tuned gut, avoiding certain foods is not just a preference but a necessity for race-day success.