Makes sense but the stubborn child in me would try and ensure that my legs tire before my core! Haha. However you're shifting big volume so if you're going to start failing you want to be sure you're not going to screw yourself over.
If I could get away without a belt at close to 1RM I would - but it's much safer with a belt I'm only 80kg and so 170kg on my back is pretty fun!
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