V-notch shorts can be quickly identified by the upside-down V-shape cutout on the side of the leg seam. They’re the most popular style among runners. This cutout allows a runner a greater range of motion compared to if there was no indent. These running shorts have a looser fit compared to compression shorts. As far as length, women's styles tend to be shorter.
SPLIT RUNNING SHORTS
Split running shorts are very similar to V-notch shorts, except the "V" on their sides is not sewn together. Instead, they are split and made with overlapping fabric. This allows even more flexibility than the V-notch shorts. The split can range in length. It can be as high as the waistband to about a one-half inch split.