If they are brief, twitchy, movements of a small part of the muscle, they are “benign” fasciculations. These are very common and can be triggered by exercise. I certainly have them and they are nothing to worry about. If you have them in any muscles other than the posterior calf (gastroc and soleus), see your doctor
Last edited by MoAlpha; 09-26-19 at 10:44 AM.