You can see all Korean batters have a wide, sweeping swing

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Since I have an interest in this subject,
I've been trying to study the hitting mechanisms used in South America or the Major Leagues where power is generated.
However, this requires a certain level of muscular strength and flexibility.
When Koreans try to do it, the swing tends to sweep out slowly.
This results in a lack of precision.
Look at the hitting in Japanese amateur baseball;
it is compact.
Look at how Korean batters keep swinging all the way through even when they are being jammed.