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Stature, weight, six skinfold measurements, and three morphological indices are reported for male and female Bantu, Ntomba and pygmoid Twa samples of Western Zaire. Although stature and weight between the groups are significantly different, skinfold thickness and limb proportions are very similar. Twenty-five males of each group were tested with a bicycle ergometer. Estimates of V02maX' derived from heart rates, indicate that the Ntomba males have, generally, greater absolute aerobic capacities than do Twa males. However, when estimated VO 2max (1 ‘ min -1) is expressed in terms of body weight or leg volume, the aerobic capacities of the groups appear to be very similar.