Yeah, I do sprints often, but I'm not sure if it's enough. it's just so weird having veins that pop up on my arms and a lot less on my legs. xO What else do I need to do to increase the visibility of the veins? Well I know they're there, I can feel them and they're really visible when I do the sprints/running, but I really want the big vein that's between the calf and the shin on the inside leg. =S not sure if that made sense... again, but yeah. =] do I need to lose more leg fat?