Ten competitive ballroom dance couples performed simulated competitive sequences of Modern and Latin American dance. Heart rate was telemetered during the dance sequences and related to direct measures of oxygen uptake and heart rate obtained while walking on a treadmill. Linear regression was employed to estimate gross and net energy expenditures of the dance sequences. A multivariate analysis of variance with repeated measures on the dance factor was applied to the data to test for interaction and main effects on the sex and dance factors. Overall mean heart rate values for the Modern dance sequence were 170 beats.min-1 and 173 beats.min-1 for males and females respectively. During the Latin American sequence mean overall heart rate for males was 168 beats.min-1 and 177 beats.min-1 for females. Predicted mean gross values of oxygen consumption for the males were 42.8 ± 5.7 ml.kg-lmin-1 and 42.8 ± 6.9 ml.kg-1min-l for the Modern and Latin American sequences respectively. Corresponding gross estimates of oxygen consumption for the females were 34.7 ± 3.8 ml.kg-lmin-1 and 36.1 ± 4.1 ml.kg-lmin-1. Males were estimated to expend 54.1 ± 8.1 kJ.min-l of energy during the Modern sequence and 54.0 ± 9.6 kJ.min-1 during the Latin American sequence, while predicted energy expediture for females was 34.7 ± 3.8 kJ.min-1 and 36.1 ± 4.1 kJ.min-1 for Modern and Latin American dance respectively. The results suggested that both males and females were dancing at greater than 80% of their maximum oxygen consumption. A significant difference between males and females was observed for predicted gross and net values of oxygen consumption (in L.min-1 and ml.kg-lmin-l).