Defining Speed Reserve Via Focused 400mTraining

Coaching Corner
Robert Marchetti

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* Shawnti Jackson ran a U.S. No. 1 time in the 400m during her NCHSAA Class 4A state championships

Photo Credit: Jeff Sides/MileSplit

Robert Marchetti is the author of MileSplit's Coaching Corner series. He's a former NCAA Division I coach and currently resides in New Jersey. For more on the series, visit all our previous stories here. He wrote this piece back in December of 2021.

By Robert Marchetti

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