I'm 5'5, 185 lbs, female.
Each session I do a minimum of 30 mins high cardio, plus circuit training or strength building exercises.
My shortest session this weeks was last night where I did 30 mins on the stair climber keeping my heart rate in the 'cardio' range.
My longest workout this week was 2 hours: 30 mins on treadmill, hour of circuit training, then 30 mins of step class.
I've increased my calories per my instructer to 1500 approx. daily and still nothing. I seem to be gaining weight only, another pound today.