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Published 13:08 9 Aug 2020 BST
Updated 13:09 9 Aug 2020 BST
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"I'd say any sort of back machine should be on here. You could use a lat pulldown for as long as you want, but still not be able to do a pull-up. There's just very little crossover for that sort of scenario."[caption id="attachment_245950" align="alignnone" width="2048"]
Photo: @fitnish on Unsplash[/caption]
2. Fixed squat rack or Smith machine
"Any sort of fixed squat or Smith machine. It's just horrendous, such a false movement.
"It's just so different to a free, barbell back squat. You could spend a year doing squats in a Smith machine and be no closer to nailing a proper squat than when you started."
3. Rebounding box jump
A standard box jump is fine, but with a rebounding one, you immediately jump backwards to the start position. And then repeat, without rest.
"There's a high level of risk with this", says George. "I've seen or know a lot of people who've snapped their Achilles doing that movement. Thankfully, you don't see it much more in CrossFit due to the risk element."Read more: Britain's fittest man shares his workout secrets to help you get in the shape of your life

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