The Radio 1 DJ was snapped wearing a sling outside the studios ready to present her daily 10am to 1pm slot.
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Sara - who was thrown from her horse during an event - revealed her injuries on Twitter last week.
"Sorry for radio/twitter silence, i foolishly exited a racehorse at full-pelt on thurs morning&broke my collar bone&generally bashed myself up," she tweeted.
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Sara is currently covering new mum Fearne Cotton's show on the station and tweeted ahead of her return to the show on Monday.
"*blast of small trumpet* I am returning to the @BBCR1 airwaves at 10am! #excited," she said.