The act of hurling was a natural activity that has been practiced in very utilitarian character.
Initially the weights were
trunks with approximately 50Kg and cast as far as possible by Scottish athletes.
After this the weight used
were natural stones.
In 1865 the weight started to be pushed from the shoulders instead of being released at ease with both hands.
Olympic Games of 1904 threw up a stone square of 25.5 kg a technique similar to the current orthodoxy.
In 1908 he created the circle of 2.135 m.
In 1952, Parry 0'Brien created his launch technique used hitherto by record holders.
In 1975 showed the technique of launching a rotating seeking to use the centrifugal force.
Source: Athletics
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