Pre Fatiguing for Endurance
Coach Claire explains the concept of pre fatiguing your legs to enhance endurance training. By breaking up the long run into two days and starting the second day with tired legs, you can better prepare your body for the demands of a marathon. The focus is on building endurance and adapting to running on tired legs.In this clip
From this podcast

The Running Explained Podcast
s1/e37 "Faster Over 40" Training as a Masters Runner with Claire Bartholic (@theplantedrunner)
Related Questions
While training for a marathon or half marathon, is it a good strategy to break up a long run over two days? For example, if I were to substitute a 10-mile long run on Saturday followed by a 3-mile recovery run on Sunday with a 7-mile run on Saturday and a 6-mile run on Sunday, would I be achieving the same adaptations?
How do long runs fit into training plans?
How should I structure my long runs when training for a marathon?