Which Research Model

ashleybreuer

Katch-McArdle or Mifflin? I'm trying to calculate my BMR and TDEE on the Scooby site and there is a 100 calorie difference in BMR's between the two research models. What is the preferred model amongst the group?

Age: 30
Female
5 ft 3.5 inches
125 lbs
20% body fat
Desk job (I sit ALL day) but I work out 5-6 days a week (running/walking at least 3 miles) and I do personal training on 2 days a week for 30 minutes (plus 20 minutes of cardio on these days). Would that put me in the moderately active range or should I play it safe and go with lightly active? When I workout, i workout hard and when running 3 miles (in 45 minutes though) my HRM says I burn approximately 500 calories.

Thanks!
Ashley

heybales

Katch-McArdle or Mifflin? I'm trying to calculate my BMR and TDEE on the Scooby site and there is a 100 calorie difference in BMR's between the two research models. What is the preferred model amongst the group?

Age: 30
Female
5 ft 3.5 inches
125 lbs
20% body fat
Desk job (I sit ALL day) but I work out 5-6 days a week (running/walking at least 3 miles) and I do personal training on 2 days a week for 30 minutes (plus 20 minutes of cardio on these days). Would that put me in the moderately active range or should I play it safe and go with lightly active? When I workout, i workout hard and when running 3 miles (in 45 minutes though) my HRM says I burn approximately 500 calories.

Thanks!
Ashley

Katch is based on LBM, and more accurate.

But I'm surprised you have that much of a difference, because Mifflin near goal weight is usually pretty good. This would imply you have less LBM than avg study participant that helped create the formula.
But with that low a BF%, something is off.

BF% was estimated how?

So do you do 1-3 hrs, or 3-5 hrs of exercise a week. Be honest with yourself.

There's other calculators too for honing in on that activity based on type and time better.

So close to goal weight, you have much less room for error if you want success.

Link near bottom of this topic, scan over how ever much to read. Better BF calc too.

http://www.myfitnesspal.com/topics/show/813720-spreadsheet-bmr-tdee-deficit-macro-calcs-hrm-zones

ashleybreuer

Katch-McArdle or Mifflin? I'm trying to calculate my BMR and TDEE on the Scooby site and there is a 100 calorie difference in BMR's between the two research models. What is the preferred model amongst the group?

Age: 30
Female
5 ft 3.5 inches
125 lbs
20% body fat
Desk job (I sit ALL day) but I work out 5-6 days a week (running/walking at least 3 miles) and I do personal training on 2 days a week for 30 minutes (plus 20 minutes of cardio on these days). Would that put me in the moderately active range or should I play it safe and go with lightly active? When I workout, i workout hard and when running 3 miles (in 45 minutes though) my HRM says I burn approximately 500 calories.

Thanks!
Ashley

Katch is based on LBM, and more accurate.

But I'm surprised you have that much of a difference, because Mifflin near goal weight is usually pretty good. This would imply you have less LBM than avg study participant that helped create the formula.
But with that low a BF%, something is off.

BF% was estimated how?

So do you do 1-3 hrs, or 3-5 hrs of exercise a week. Be honest with yourself.

There's other calculators too for honing in on that activity based on type and time better.

So close to goal weight, you have much less room for error if you want success.

Link near bottom of this topic, scan over how ever much to read. Better BF calc too.

http://www.myfitnesspal.com/topics/show/813720-spreadsheet-bmr-tdee-deficit-macro-calcs-hrm-zones

Thanks! To be honest on the body fat percentage it's only been monitored through the hand analyzer and also the foot analyzer (scale) at home. But between the two I fluctuate between 19 - 20% so I rounded up to 20% to be conservative.

I would honestly say I do 3-5 hours per week of exercise because I log my time and calories via my HRM and each workout session is no less than 45 minutes and I go 5-6 days per week (as of late it's been 6 days per week because i'm training for a half marathon). I think like I feel i should be 'lightly active' is because i sit all day for work (anywhere from 8 - 12 hours) and when not working or working out there's not much activity going on at home, outside of the usual house cleaning. We are quite the TV junkies i'm ashamed to admit. So I just want to make sure i'm picking a true activity level that reflects my lifestyle as a whole. I don't want to eat more calories because I think i can and then end up messing up my end results. Weight wise I think i'm at a happy weight but could stand to lose a bit more body fat but i'm focusing on strength building and preparing for the half marathon.

Thanks for your help!
Ashley

ashleybreuer

Bump