I do not believe fasciculations are caused by anxiety. I am still going back to my theory that during times of being athletic, then that is how they are brought on. A receptor during repeated daily physical activity loses its' sensor, and that is how they start. Once they start they don't stop, but kind of go through periods where some days they are more frequent than others. Anxiety happens after the fact.... for example, fasciculations are a fairly common consequence of being physically fit, but then the person starts to worry something is wrong, google symptoms about MS or ALS or other weird stuff, and that is not the case. So then they are constantly looking for and waiting for the fasciculations to happen. If you are still they are more numerous because your muscles are at rest. When you are active you do not feel them. If you are being still and waiting for them to happen, then they will happen and be more noticeable because you are just sitting there looking for them. Probably from cycling acetylcholine at rest and how they affect the sensors of the muscles, lactic acid, or some other hormone that is normal when you are at rest.. totally NORMAL. You should not worry. It's something you just have to learn to live with. It is annoying, yes, but is not harmful or pathological in any way, shape, or form. Just ACCEPT it. It's from heavy exercise, I am telling you, that's what creates them. You need to accept it so that you can move on. Good luck.