An exploratory study was undertaken to obtain data on arm measurements of competitive female tennis players (n = 30) at three age levels — prepubertal (10-12years), post-pubertal (16-18years) and mature (45-70years). They were matched with persons who did not play with racquets but who had generally played sport (non-racquet sports persons, n = 30). Comparisons were to be made between the arms they preferred for playing tennis with their other (non-preferred) arms, and with the arms of non-racquet sports persons. The results suggest that competitive female tennis players differ from non-racquet sports persons, in that these