The BBC newsreader received medical treatment after she “stripped” the muscle on her rib.
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Kate Silverton
PA Wire/PA Images
She tweeted a video of her lying on the floor laughing as she inhaled pain medication Entonox on Friday.
However, she has vowed to perform on Saturday’s live show, where she is set to dance the Argentine Tango with partner Aljaz Skorjanec.
In the video, Kate said: “The last time I did this was in childbirth which was really good, actually I’ve forgotten how good it was.
“I’ve somehow stripped the muscle in my rib on my best dance, on my best dance.”
She then pointed the camera at the medic treating her injury, who joked she was “sucking the life out of” the pain relief.
He added: “It’s Nitrogen and Oxygen which is used to relax the muscles, which is why Kate is on the floor at the moment and she’s constantly sucking on it like it’s a cigar.”
Kate then said: “I will be dancing tomorrow, if it’s the last thing I do.”
She also revealed that preparations for her performance were still going on around her, as she was having fake tan applied at the same time as undergoing treatment.
She said: “Welcome to the world of Strictly, this is me about to have Eloise do my fake tan because I am going to be dancing tomorrow!
“This is how we roll in showbusiness, I am going to be dancing!”
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Kate with dance partner Aljaz Skorjanec
EMPICS Entertainment
As Aljaz entered the room, Kate partner told him: “Hello baby, I’m just saying that the show is going on, because I’m having a fake tan for tomorrow because I am going to be dancing.”
‘Strictly Come Dancing’ continues on Saturday at 7.05pm on BBC One.
15 Dream 'Strictly Come Dancing' Celebs
Danny Dyer(01 of15)
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Seeing Danny Dyer taking his trotters for a Jack Plance is exactly what TV was made for, and whilst it might seem unlikely he'd ever sign up, don't forget he once said he'd "never" do 'EastEnders'... (credit:Matt Crossick/Matt Crossick)
Nigella Lawson(02 of15)
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Nigella loves anything decadent and extra, and with 'Strictly' being the most decadent and extra show on TV, quite why she hasn't signed up yet is a mystery to us. (credit:Lou Rocco via Getty Images)
Courtney Act / Shane Janek(03 of15)
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Bosses may not be keen on casting former reality TV stars, but they should probably make an exception for 'Drag Race' alum and 'Celebrity Big Brother' winner Courtney, who would bring some drag queen glam to the often binary world of ballroom. (credit:PA Archive/PA Images)
Idris Elba(04 of15)
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He may be busy having a huge Hollywood career, but wouldn't it be great to see Idris back on home turf? Plus, just look at how smooth he'd look in ballroom top and tails. (credit:PA Archive/PA Images)
Stacey Solomon(05 of15)
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When it was teased one of the 2018 contestants would be revealed on 'Loose Women', many fans predicted it would be panellist Stacey Solomon getting her dancing shoes on. And as much as we're excited to see Lee, Stacey would have been a brilliant booking. (credit:Doug Peters/EMPICS Entertainment)
Richard Madeley(06 of15)
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Just imagine Richard and Craig Revel Horwood clashing. TV gold. (credit:Anthony Harvey via Getty Images)
Gemma Collins(07 of15)
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The 'TOWIE' star was holding out for a spot on the 2018 line-up by way of compensation from the BBC, following *that* on-stage fall at the Radio 1 Teen Awards. And while bosses probably didn't want to give in to her diva demands, just think of all the meme-able content she would have served up. (credit:Karwai Tang via Getty Images)
Nadiya Hussain(08 of15)
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Snapping up the most popular winner of what was once the BBC's most popular show is a no brainer, right? (credit:PA Archive/PA Images)
Michelle Keegan(09 of15)
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The former 'Corrie' star has been tipped for 'Strictly' every year in recent memory, so we'd like her finally do it, even if it's just so we never have to hear a "Michelle Keegan for 'Strictly'" rumour again. (credit:Doug Peters/Doug Peters)
Rio Ferdinand(10 of15)
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Every series needs a sportsman, and what better man than former England captain and all-round good guy Rio Ferdinand? Given all that footwork on the pitch, we reckon he'd probably have the moves on the dancefloor too. (credit:Pierre Suu via Getty Images)
Beverley Callard(11 of15)
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From the look of this picture, the wardrobe department wouldn't even have to make any outfits for Bev - she'd be able to bring in her own frocks. (credit:Doug Peters/Doug Peters)
Greg James(12 of15)
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Having taken over as the host of the Radio 1 Breakfast Show, Greg has just earned a whole new following. And what better way to capitalise on that than by doing 'Strictly'? (credit:Neil Mockford via Getty Images)
Alan Carr(13 of15)
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Far be from us to suggest Alan would not be the most talented of dancers, but he'd be guaranteed to bring the laughs. (credit:Tim P. Whitby via Getty Images)
Sara Cox(14 of15)
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The Radio 2 DJ was robbed of a full run as a contestant when she took part in the 2013 Christmas special, if you ask us. (credit:Ian West - PA Images via Getty Images)
Paddy McGuinness(15 of15)
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Let the dance see the floor! (credit:PA Archive/PA Images)