"butter"ing my fly endurance

Former Member
Former Member
Hey everybody! I think I may finally be starting to grasp the concepts of butterfly. I can actually do what I would consider to be medicore fly now, but I can only do it for one length at a time. How can I build my endurance so that I can do at least a 50...that's my goal for now is 50 yds none stop. Is there anyway to better this than just swimming? Thanx! ~Kyra