Martial arts are for more than just self-defense in SheridanSHERIDAN – Like a lot of men with young children, Troy Eckert’s dad was looking for an activity he could share with his son, who then 9 years old. Some hunt, some wrench on cars, others play sports. For Troy and his father, Saturday mornings were spent in the dojo, learning taekwondo, a Korean self-defense technique.