 The shot put has been an Olympic sport for men since 1896 and a women 's competition using a 4 kg ( 8 @.@ 82 lb ) shot was added in 1948 . Further throwing techniques have arisen since the post @-@ war era : in the 1950s Parry O 'Brien popularised the 180 degree turn and throw technique commonly known as the " <unk> " , breaking the world record 17 times along the way , while <unk> <unk> and Brian Oldfield introduced the " spin " or rotational technique in 1976 . 
