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1:48
The intensity of running at Repetition pace puts considerable stress on the body to provide energy anaerobically, which in turn produces beneficial changes in anaerobic pathways, where fuel is converted to energy in the absence of adequate oxygen. By practicing at Repetition pace you learn to run more relaxed and faster, and race pace becomes more comfortable because you recruit the exact muscle fibers needed for economical running. These are muscle cells that allow you to run fast with minimal
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