Scooby's TDEE Calculator vs IIFYM.com
TBoom915
Posts: 115 Member
Who uses scooby's tdee calculator and who uses iifym.com's calculator? I seem to get different results with each. For those that have used both, which do you feel seems to be more accurate?
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Hi, I asked myself the same question.
Both give me a difference of about 200 calories, iifym.com is the lower result. So I feel scooby is more accurate :-D No, honestly, I was advised to calculate the average of both.
But I don´t know why the results are so different and how reliable the whole thing is then...0 -
Hi, I asked myself the same question.
Both give me a difference of about 200 calories, iifym.com is the lower result. So I feel scooby is more accurate :-D No, honestly, I was advised to calculate the average of both.
But I don´t know why the results are so different and how reliable the whole thing is then...
I didn't think of calculating the average. I'll try that route. My concern also is the macros IIFYM.com give me is drastically different from Scooby's, I don't know which to follow.0 -
I have found IIFYM to be closer to my numbers. But you'll hear varying stories.0
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I've always heard ones comparing say IIFYM is lower estimate by decent amount. I'm not sure what study formula's they are using. It's about 500 below using 5 days a week compared to normal tables for me.
Scooby is using Harris study from 1919, which is the standard TDEE tables you get from anywhere.
And most with Fitbits and BodyMedias will report that even prior to getting more active - their sedentary desk job had them at higher TDEE calorie burn than even the Harris TDEE table for sedentary was estimating.
So I'm thinking if that many are higher than the higher estimate - then IIFYM is really low.
Perhaps IIFYM is counting on bad counting of what you eat, figuring they'll take care of you over-estimating your food. Though that doesn't make sense because usually people underestimate.
I know I distrust them just because of this broad claim on their site and many others - "The IIFYM TDEE Calculator is designed to give you your exact TDEE based on a few key factors "
Yeah, right, exact?
I know their option where you can enter your own activity hours (that doesn't change daily?) comes from a WHO study, also used here, where they tell you where it came from at least.
http://www.exrx.net/Calculators/CalRequire.html
I also love how they go by the ancient idea of days per week, rather than hrs. So me doing 3 days a week of riding hard 2 hrs each day is the same as someone walking for 45 min 3 days a week? Ya right.
And then option for daily exercise + physical job. Well what about physical job and 3 days a week exercise?
It was that kind of total lack of specifics that made me create the spreadsheet that gets more specific, still using the WHO study method, but making it just 3 divisions of exercise, and 3 divisions of different types of work activity if you even have any, all on weekly time, averaged back out daily.
Also, their protein and fat recommendations is tad overkill according to studies of even weight lifters during a cut to maintain muscle mass, and well above general population to retain while in a diet.0 -
Also, their protein and fat recommendations is tad overkill according to studies of even weight lifters during a cut to maintain muscle mass, and well above general population to retain while in a diet.
Wow thanks for all of this information, it puts some things in perspective. I'm glad you brought up the fact that their macros are overkill. It had me at consuming 203g protein, 87g fat, and 73g carb and I was like wowzers that's extreme. I want to lower my carbs but I'm not trying to do low carbs and the fat seemed so high...sheesh0
