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Karl Stefanovic weighs himself live on air
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Retrain your brain
01:00
Dr Nick hops in bed with Karl to discuss the importance of sleep
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This week Dr Nick is in the supermarket to discuss the third principle of Interval Weight Loss - The Full Rainbow
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Karl Stefanovic weighs in on week five of the Interval Weight Loss challenge
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Karl Stefanovic reveals results of his final weigh-in