I sometimes notice that men with scrawny, sloppy necks have thinning hair. Is there some physiological connection? Perhaps men with poor neck musculature are not getting sufficient blood supply to the scalp. Of course that bit of speculation sounds ridiculous even to me. Still there is that thing called observation - people with bad necks often have bad hair.
Take a look at this video I made. The exercise that I demonstrate tones up and strengthens the neck muscles. A well-developed neck probably means better circulation to the head where there might still be some viable hair left. But if the neck/hair connection sounds suspiciously like the worst kind of alternative medicine, at least a clean-cut neck and a well-defined jawline are always neat assets to have.
The neck exercise that I show in the video will definitely give you a well-defined neck and a clean, sharp jawline.
And here is the same demonstration for those people who speak Spanish - la gente que habla español.
By the way, the loose flesh hanging under the throat is called a dewlap. (In Spanish, la papada) The exercise that I demonstrate on the video might prevent that loose, hanging flesh from forming. No money-back guarantee on that vague promise though.
The Muscles Around the Eyes
And while you're toning up your neck muscles why not do something for the muscles around the eyes. In the following video I'll show you an exercise that will keep the eyes looking young. This along with the scalp exercise will keep the upper face toned-up and expressive.
Instead of doing a lot of repetitions and sets, I think it is best to concentrate on good form and good facial posture when doing these exercises. I have not seen quick, dramatic results in the people who do these exercises. But I have seen modest gains that become evident after six or eight months.