Dave Davis: Coach Davis has coached with the Elmhurst Swim Team since it started in 1991. He has seen the team grow from 40 swimmers to over 250 during those years.. Coach Davis also coaches for York High School. His favorite sets for swimmers always involve descending intervals and an increase in speed. His favorite drill is to have swimmers keep a stroke count by 25’s during a long swim and see how efficient they can be. (more distance per stroke) It is like getting better gas mileage in your car.