Comprehensive study of 500 marathon runners using continuous glucose monitoring and pace analysis throughout races. The “wall” phenomenon correlates strongly with muscle and liver glycogen depletion, typically occurring between miles 18-22. Athletes following structured fueling protocols (30-60g carbs/hour after mile 8) showed 73% reduction in wall occurrence. Blood lactate and rating of perceived exertion data confirm metabolic shift from primarily glycolytic to increased fat oxidation.
Tag: wall
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Understanding the Wall and How to Avoid It
The wall is caused by glycogen depletion. Proper training and fueling can prevent it.
Source: Runner’s World