Originally Posted by cam_girls

I mean the feel to the heavy weights has a Qualitative difference, not just Quantitative.

I'm sure you all get that! It's like moving from plastic to steel when you bench over 250lbs

Say you bench 100kg full range repetitions.

But you can manage the weight ok,complete the set but you're a bit wonky / shaky.

So you want to move up to 110kg but think it could be dangerous, you might not get the bar back on the rack or keep it level.

THEN... doing those half reps on 120kg first would get you used to the 'wonky top range' of the motion.

Remember he's not just doing the 5cm reps, he's getting it off the rack, reps, then back on the rack too.

That's how I was taught to ride a motorbike. go from standing still, start it up, ride 1m, stop, turn it off, side stand... repeat.