I've found that some people are simply lacking muscle tone in the muscles of the front of the neck and under the jaw and that when they strengthen them it will cause them to be significantly less saggy and reduce the appearance of a double chin. This is different than the false concept of spot reducing. In the case of someone who's lean and still has a double chin some good portion of the time it's loose muscles rather than loose skin that's responsible . The goal isn't to reduce fat but to firm up those slack muscles. Since the OP stated that they were slim and had always had a double chin I think there's a decent chance it might make a noticeable difference.
You don't have to put on huge amounts of muscle, you just have to do enough work to strengthen muscles that are in a state of disuse atrophy so that they can do their job. I've never used neck exercises with a client with a goal of changing their appearance but it has had the effect more than once. I've been surprised that even a number of rather over fat individuals have had a substantial reduction in the appearance of a double chin after making only modest strength gains.
Oh, I think I misunderstood your use of the word "sick". The generation younger than me uses "sick" as a slang term to mean really great, or impressive. I had assumed (I'm now guessing incorrectly) that you were saying someone would need to develop a very impressive set of neck muscles to have an impact. If on the other hand you meant that they would need to have some dysfunction in their neck muscles for exercise to have an impact on a double chin we're on the same page.
Awesome... I needed that one.
Beat me to it.
If you are truly slim, the condition doesn't run in your family, and you have tried exercise then I suggest you see your doctor to rule out any potential anomalies. If all the former boxes have been checked the decision making process should be clearer and easier.
Sorry to contradict you but muscles cannot ‘sag’ or lose their tone unless you have a serous pathology. The length of a muscle is kept optimal (minimal) for the joint position by muscle spindles and specifically by the action of the gamma motonuerones (this was the area of my PhD research!). Thus there’s no ‘reeling in of slack’ when a muscle is contracted because there isn’t any. Age-related loss of elastin and collagen can make the surrounding tissues sag, however.
) and mylohyoid, the sling forming the floor of the mouth (I used to teach anatomy of the head and neck
). 
…or grow a beard 
Very well articulated post! However, digastrics were not what distracted me in that movie…Sorry to contradict you but muscles cannot ‘sag’ or lose their tone unless you have a serous pathology. The length of a muscle is kept optimal (minimal) for the joint position by muscle spindles and specifically by the action of the gamma motonuerones (this was the area of my PhD research!). Thus there’s no ‘reeling in of slack’ when a muscle is contracted because there isn’t any. Age-related loss of elastin and collagen can make the surrounding tissues sag, however.
The muscles inferior to the mandible are (from superficial to deep), platysma (the ‘shaver’s muscle’), anterior belly of digastric (Natalie Portman has very visible A.B of digastrics in ‘Black Swan’. It was very distracting for me as I couldn’t think about anything else
It’s far more likely that the deposition of excessive fat in a genetically-determined pattern is the cause of this. Some people put fat on their belly, hips, waist or bum depending upon their sex and genetic predispositions. My girlfriend tells me mine goes on my head. Dieting or liposuction are the only solutions…
There was dancing? Hmm…Ah yes…the spectacular dancing…
Is that a euphemism?Ah yes…the spectacular dancing…
I don’t know, I was entranced by Portman’s prominent anterior belly of digastric!Ah yes…the spectacular dancing…
I’m maybe backing myself into a corner, nobody puts baby in a corner…Ah yes…the spectacular dancing…
I think you’re getting a bit Footloose with your posts…
Perhaps it's a change in posture then. I've never instructed anyone to train just the anterior muscles in the neck, so if I'm doing neck work with a client I am also working the posterior muscles, etc. Many of my clients had very head forward posture related to computer work. I may very well have spoken hastily as my goals in training others are primarily functional, rather than aesthetic, and I've never set out to correct someone's sagging chin. I have seen it improve with increased neck strength. Perhaps it is because they achieve a more natural, less head forward, posture the appearance of a double chin is reduced or becomes less noticeable.Sorry to contradict you but muscles cannot ‘sag’ or lose their tone unless you have a serous pathology. The length of a muscle is kept optimal (minimal) for the joint position by muscle spindles and specifically by the action of the gamma motonuerones (this was the area of my PhD research!). Thus there’s no ‘reeling in of slack’ when a muscle is contracted because there isn’t any. Age-related loss of elastin and collagen can make the surrounding tissues sag, however.
The muscles inferior to the mandible are (from superficial to deep), platysma (the ‘shaver’s muscle’), anterior belly of digastric (Natalie Portman has very visible A.B of digastrics in ‘Black Swan’. It was very distracting for me as I couldn’t think about anything else
It’s far more likely that the deposition of excessive fat in a genetically-determined pattern is the cause of this. Some people put fat on their belly, hips, waist or bum depending upon their sex and genetic predispositions. My girlfriend tells me mine goes on my head. Dieting or liposuction are the only solutions…
Think nothing of it! This forum is all about ideas, solutions, thoughts and opinions and your’s was very interesting.
That's the beauty of forums like this. Even if it's not the stated goal for your clients, I would be surprised if those with double-chins didn't want to get rid of them, so it's a nice thing to think/learn about.
