Psychology, belief, or training development?

Mindset advocates wax lyrical about Roger Bannister who on May 6, 1954, broke the world record for the mile by nearly two seconds, becoming the first man to (officially) run the distance in under four minutes. The previous world record had lasted for nine years. Within 46 days, Australian Jim Landry broke Bannister’s record by a further 1.5 seconds.

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