From the daily Reports:
BMR is your Basal Metabolic Rate, which is the number of calories your body burns on a daily basis to perform its basic tasks like breathing and pumping blood. The BMR calculation is based on your age and weight and accounts for a sedentary lifestyle. The BMR in the chart above has been multipled by 1.2 to account for the calories you need for both basal metabolic functions and light activity outside of exercise (such as light walking on the job, deskwork, and running errands.) Please note that BMR is not a perfect measure.
Your BMR will not change according to what you eat - your calorie differential will. If you want, you can post your question at the expert's board for Nutrition & Diet www.sparkpeople.com/myspark/messageboard_t
or Fitness & Exercise www.sparkpeople.com/myspark/messageboard_t
but your basic BMR is not going to change the way you are stating it. This is why I am confused and cannot answer your question.
It sounds like you might be using a Heart Rate Monitor or perhaps not the right calculations for BMR?
The way it was explained to me is this - I can safely consume the calories equivalent to my BMR without ever exercising and expect to maintain my current weight. So, I can safely eat 1400 calories daily and expect my weight to remain the same.
If I exercise and burn 400 calories daily, I can raise my calorie input to 1800 safely and not gain weight. But my BMR remains at 1400 for a sedentary lifestyle. The only thing changing is my calories in for my calories out.
| current weight: 122.0