Short blade swim fins are significantly shorter than your long blade fins. Short swim fins offer a wider range of styles, including both angled and flat edges, designed specifically to target different muscle groups and strokes. Because of the short design, short blade fins tend to be stiffer and less flexible on your foot. Short blade fins make it easier to keep up a quick tempo at a higher kick rate which helps with correcting technique, and mimicking a natural race speed while it builds true, stroke-specific strength in the leg muscles. Short blade fins are more suitable for more experienced swimmers, who are training hard.