The Curves program is designed to improve fitness. The purpose of this study was to identify exercise intensity, HR and energy expenditure in a group of women participating in the Curves program. Seventy-eight women (53.6 ± 7.09 yrs, 192.1 ± 30.43 pounds, 43.5 ± 4.52 % fat) performed the Curves workout on two occasions. Results show that mean HR was 119 ± 15 b/min which was equivalent to 79% max HR or 63 % HRR. Thirty-three women (52.7 ± 6.68 yrs, 193.1 ± 31.73 pounds, 1.8 ± 0.28 L/min VO2 max) performed the Curves 30-min workout on two occasions. Results show that the mean RER to perform the 30-min workout was 1.00 ± 0.07 and 0.98 ± 0.05 for the two sessions. Estimated caloric expenditure was 164.5 ± 25.19 kcals and 160.6 ± 28.36 kcals for the two sessions. Results indicate that the Curves program qualifies as moderate intensity exercise.