Traps can take a lot. I don't care who's body they are on. They are a big strong muscle. To overload the muscle without overloading your CNS you need to hit it with a lot of reps instead of a lot of weight. 40-50 reps on a low weight will do that. It's like HIIT for your traps.
It might not necessarily be the best approach in this case, but I would sure recommend giving it a try.
And the whole not being able to hold up his head is only in the case of not listening to what your body is telling you, which would be the same story no matter what the muscle may be. your body will always tell you when enough is enough
Trust me. My body will never see 40 to 50 reps (in one set) for trap development within my Full-Body routine.
Personally, I see it simply as unnecessary among an "appropriately constructed" Full-Body Routine. The traps do NOT (in most "average" cases) take much stimulant encouragement to grow (with diet supporting growth), and "generally" reps are in the upper limit range.
Additionally, most persons when they speak about the traps (or look! I have huge traps!), are "generally" speaking about the "view" muscle in the front, and
generally are not speaking about the rear or the portion around the scapula and other portions of the upper and middle back (or overall development), and some do not know its overall function (as a whole).
The upper fibers (the so-called show muscle) lift the scapula, and the "shrug" tends to recruit these fibers, as do Upright Rows and Lateral Raises (as examples). And, even the Military Press to some degree. Rows and the mighty and exceptional Dead Lift recruit more of the Middle (as an example). The lower portion of the "traps" pull the scapula down, and Cleans and Front Deltoid Raises (over head) tend to recruit these fibers during the execution of the movement (as an example).
Additionally, the shrug is suppose to be a controlled movement focusing on the muscle worked and the squeeze: Keeping your head up, spine neutral, and pulling your shoulder blades up high and raising your shoulders to your ears----Squeezing at the top to---sustain the peak contraction and then lowering the weight fully and repeat. In addition, one can use an over and under hand grip, but I would recommend switching which one is under/over from set to set.
I work my traps; however, I am not going to do 40 to 50 reps per set, nor am I going to recommend one do so. Additionally, I am not just concerned about the show muscle, if I am going to develop this muscle, then I want to recruit the "entire" muscle, and this can be done through: The "Shrug" and Dead Lift, and Dead Lift with Shrug, Upright Row, DB Arm Pits, etc (as examples) and......indirectly by execution of other exercises within a Full-Body routine.
In my personal trap development, I have strength and a weakness for my size and weight. I have very strong rear and upper back development, but rather weak show case muscle in the front (at least in my opinion)--which I am working on in this bulk period. I am going to upload some more pics from when I was 152/154 pounds showing the upper back. There is a striking difference, but the traps in the front need improvement, while the upper back is coming along just fine.
Best regards,
Chillen