EVF is like kicking, improving it is a good thinghttps://community.usms.org/swimming/f/general/9329/evf-is-like-kicking-improving-it-is-a-good-thingAn article about the importance of and EVF. www.swimmingcoach.org/.../EVFbyTomTopolskiSMALL.pdfen-USTelligent Community 12