The 400 Is a Sprint

The 400m is a sprint; the 800 is the hybrid. And although speed training for the 400m seems counterintuitive, it should be the priority.

Relationship between 400 m season's best (SB) and the maximal sprint

The 400 Is a Sprint

The Only 3 Reasons Your Sprinters Fall Apart at the End of Races

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What's A Good 400m Time? Average 400 Meter Times By Age + Sex

The 400 Is a Sprint

Could a runner win Olympic gold medals in the 400-meter, 800-meter, and the 1,500-meter races? - Quora

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8x400 Treadmill Sprints - Fitting It All In

The 400 Is a Sprint