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Using dumbbells instead of a bar also builds stronger stabilization muscles, and doesn't let your strong side compensate for weak side.

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True but once you start getting heavy it can be difficult to get into the proper starting position for some lifts as well finishing safely. YMMV.

That is definitely true! Very useful in the "I want to start developing stronger functional muscles" context, but will only get you to a certain point

If memory serves, last time I was lifting weights regularly, I could bench 225lb with a bar, but only 140ish (2x70lb) with dumbbells.

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