This study was undertaken to characterize the oxygen consumption and heart rate responses of subjects during laboratory simulated aerobic dance circuit training sessions. Sixteen female subjects performed six randomly assigned 30-minute aerobic dance circuit training protocols. Oxygen consumption and heart rate responses were monitored in response to changes in three independent variables which were: interval duration, leg involvement and fitness level. Results revealed that the different interval durations generated significantly different oxygen costs. Also, it was found that in relative terms (% of max VO$ sb2$), the low fitness group (max VO$ sb2 $ 45 ml/kg.min). Furthermore, it was found that the involvement of deep knee bends during the resistance training segment of the circuit significantly increased the oxygen cost when the resistance training segments were compared. Finally, the results showed that exercise intensity was overestimated when using percentage of max HR.

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