All trends Houston, Texas, YMCA senior program director Karen Behrend has seen come and go in her 28 years of teaching group fitness.

在卡伦·贝伦德的眼中，这些健身方式都曾昙花一现。卡伦是德州休斯顿市的YMCA的高级健身教练，她有着28年的教练经历。

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All trends Houston, Texas, YMCA senior program director Karen Behrend has seen come and go in her 28 years of teaching group fitness.

在卡伦·贝伦德的眼中，这些健身方式都曾昙花一现。卡伦是德州休斯顿市的YMCA的高级健身教练，她有着28年的教练经历。

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