Calling all competitors: Having the right sports apparel can make a good workout better and a bad one more bearable. This is especially true of shorts. If you have well-fitting, comfortable shorts, you can focus on your workouts and not on the fact that your shorts are riding up. During your training, try some different types of shorts to determine what styles work for you.
Whether you're a competitive runner or a competitive biker, your preference on shorts depends on your comfort and mobility level. For some, wearing the fitted “biking style” shorts for running is more comfortable because baggier running shorts have a tendancy to bunch up between the legs. The bottom line (pardon the pun) is: Never wear a style of shorts for a major competition that you haven't worn in practice; you may experience chafing in areas that you didn't anticipate.
If you prefer a longer, fitted shorts style in women's sportswear, check out the women's 9-inch Power Liner shorts from Champion. They can be worn alone or underneath a baggier style of shorts or pants, or even one of the new “sport skirts” that are starting to cross over from tennis into other sports.