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    PURPLEKITTY57   23,664
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BMR Correction to Spark


Monday, December 12, 2011

My personal trainer told me I am not eating enough to keep my body burning calories for the amount of exercise I am doing. I explained that spark calculated it; then I found out that Spark 'assumes everyone is sedentary' so only uses the 1.2 multiplier! So I found another site that explains how you should calculate your BMR based on your activity:
If you rarely exercise, multiply your BMR by 1.2. THIS IS SPARKS CALC.
If you exercise on 1 to 3 days per week, doing light activity, multiply your BMR by 1.375.
If you exercise on 3 to 5 days per week, doing moderate activity, multiply your BMR by 1.55.
If you exercise 6 to 7 days per week, doing vigorous activity, multiply your BMR by 1.725.
If you exercise every day and have a physical job or if you often exercise twice a day, multiply your BMR by 1.9.

Added Note: so to be sure you are eating enough to keep up your strength while exercising, but NOT over eating, this is the guideline to use.
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Member Comments About This Blog Post:
MOBYCARP 12/15/2011 7:59PM

    That's interesting. I have no idea what formula SP uses to calculate calories needed, but I know that my current calorie range is calculated by telling SP that I plan to burn 6870 calories through exercise. What I report on SP isn't close to that amount (3504 last week), but I might have to increase it a bit to maintain my weight.

You've provided me with a conceptual framework for understanding what's going on with the SP fitness/nutritional tracker interaction. Thank you!

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FROGGGY13 12/15/2011 1:52AM

    Well, I go by Spark guidelines, but I know they are not entirely accurate. I am losing faster than Spark predictions while eating by the guidelines and exercising less than I had set it up for. I think you really need to tweakby your body's reactions.

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BREWMASTERBILL 12/12/2011 9:03AM

    Well, not quite. SP does use a multiplier, however, if you give SP a goal weight and a goal date, you can add expected calories burned per week from fitness and it will calculate a daily recommendation based on the BMR, burn rate and date. I think the multiplier is arbitrary. I actually prefer the SP way.

But with all of that said, none of this is entirely accurate. You don't really know what your BMR is. It's a guess. So is the burn rate due to activity. The only thing that's probably even remotely accurate is your consumption assuming that you measure and log every single bite.

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YOGAYARNIE 12/12/2011 8:37AM

    emoticon

I know the last time I used SparkPeople I used a calculator from another website to determine my calorie and macronutrient ranges because I as working out a lot.

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