A typical Fitness competition consists of a swimsuit round, and a routines round. In the swimsuit round, the competitors wear two-piece swimsuits and high-heeled shoes, presenting their physiques with a series of quarter- or half-turns toward the judges and audience. Physique guidelines for fitness competitions typically suggest a small amount of muscular mass; clear separations between muscle groups (but, no visible striations); and, leanness. The swimsuit must cover at least fifty percent of the gluteus maximus muscle; no thongs or G-strings are allowed. The routine round requires a physically-active stage performance; most competitors attempt aerobic, dance, and/or gymnastic routines.