David dropped 24.2 seconds in a year!

  
 
 
 
 
 
 
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 David started training for the 400m one year ago. His first time trial was an 82. One year later his new personal best is a 57.8. Nice work dropping 24.2 seconds in a year! #mondaymotivation #hardwork #dedication #sprinting #400m #track #rateofforcedevelopment #strengthtraining #goals #improvement #lifestylechanges #eatsleepsprintlift #resultsdriven #performancetrainingsystems
 
A post shared by  Performance Training Systems (@ptschicago) on Sep 17, 2018 at 4:45am PDT