FLEXonline.com brings you the top 10 hardest-training bodybuilders of all time and the routines that helped put them on the list.

 ROY CALLENDER: BACK >> 

 BRANCH WARREN: CHEST >> 

 RICH GASPARI: LEGS >> 

 JOHN DEFENDIS: TRICEPS >> 

 CHRIS CORMIER: CHEST >> 

 RONNIE COLEMAN: BICEPS >> 

 CASEY VIATOR: SHOULDERS >> 

 DORIAN YATES: BACK >> 

 TOM PLATZ: LEGS >> 

 DAVID HENRY: BICEPS >> 

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