What behavioral or anatomic factors contribute to varicoceles? i'm particularly curious about tight pelvic muscles and breathing difficulties.

Here are some...: Varicocele is specifically designated to denote the presence of venous dilation resulting from inborn defect of spermatic venous valves , which occurs in some 15% of adult men with 90% in left side and some 10% involving both sides. So its occurrence would not be associated with physical activities, but which may increase its related symptoms just like that commonly occurring in lower legs.