There's nothing wrong with running in grubby shorts and a faded Dartmouth sweatshirt circa 1992. But there's something about throwing on some bright, colorful - and relatively affordable - workout wear that lifts any athlete's spirits. Take neon from the runway to the Rose F. Kennedy Greenway in Target's orange sports bra or Nike's flattering Tempo shorts with hot pink piping. Go ahead, check yourself out in shop windows as you whiz past.