Partials are a tool but shouldn't be the majority training protocol. Lets face it. Bodybuilding attracts the insecure. What better way to build up the ego than by doing partial reps. Load up the leg press and tell everyone you use 900lbs barely bending your knees. Do half range shoulder presses and brag about using the 120lbs dumbbells. Use the rack to do partial deadlifts with 700lbs when you can't pull 450lbs off the ground. They are liars to the public and most of all to their fragile ego.
You're there to work your muscle and that means doing an exercise in the hardest way possible and not the easiest. Every gym I go to has these guys strutting after a set thinking everyone is impressed with their strength. There is an old man in my gym that does this. His wife said her husband is the strongest guy in the gym. Here's an example. In the seated delt press machine he lowers the seat all the way then puts the pin in the lowest plate. He does less than a half rep with the stack. If he wanted to work his muscles in the hardest manner he should put the seat as high as he could to increase the range of motion. Bet he wouldn't be able to use half the plates for his set.
Don't get me started on pullup liars.
I see, but I would really like to give half reps a try, I never spare my workout time trying that protocol.
I believe it can train your CNS for higher weight and be beneficial for tendons.
BTW I don't think leg press is a good choice for quarter reps,
Partial deadlifts, curls and power rack bench presses seem much more logical choice.
Imagine doing partials with more than 60 percent of your max deadlift, that would definitely effect your core, grip, traps and hams.
Ofcourse it is much easier lie down on leg press and barely move your knees for retards.