The fitness star, 35, was diagnosed in August after finding a lump in her breast and has since undergone one surgery and 12 weeks of chemotherapy.
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Peloton instructor Leanne Hainsby, 35, hosts 'first class' since revealing breast cancer battle
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Peloton's Leanne Hainsby, 35, diagnosed with breast cancer
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Peloton instructor Leanne Hainsby, 35, hosts 'first class' since revealing breast cancer battle