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Roller Derby Jams are what the periods of a bout are split into.
So in a Bout you have 2 periods, each are 30 minutes long.
During the periods, you have what we call Jams, which last either 2 minutes or until the Lead Jammer ends the Jam by "calling it off".
Since not every jam is 2 minutes there is no specified number of jams in one period.
hope this helps. =)
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∙ 11y ago
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