Shadowboxing, Wiki Ippo

Shadowboxing (シャドーボクシング, Shadōbokushingu) is a training exercise used in boxing. A boxer thinks of an imaginary "shadow" opponent to fight with and attacks using various punches while dodging imaginary punches. A boxer can have trouble against the imaginary opponent if they don't know their movements. If a boxer is correctly doing shadowboxing, onlookers can see what they are fighting against. Tatsuya Kimura listens to music during his shadowboxing to increase the tempo of the rhythm of his foot

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