How long to carb load before an event?
                                
                                
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                                    3 min read                                
                            
                                According to research published in the journal *Sports Medicine*, effective carb loading can improve endurance performance by 2-3% in events lasting over 90 minutes. The key to reaping these benefits lies in knowing not just what to eat, but critically, how long to carb load before an event to properly fill your muscles' glycogen stores for race day.