I hope you're saying it's off based on your past experience with professional tests and not just "doesn't seem right".
It's not like I pulled these equations out of my ass. I am taking the average multipliers and using the equation from:
Calorie Burning Chart, Calories Burned Per Minute of Exercise By Weight, Calorie Burning Chart, Exercise, What About Exercise?
and the BMR equation:
Weight Loss - BMR - How Many Calories Should I Eat - How to Calculate Caloric Needs - Basal Metabolic Rate Forumla
Which is the same equation for the site you gave me.
To say that I should just multiply it by a percentage is rather innaccurate. There are a lot of other factors like height, weight, age, sex, body type etc...
So I think the activity multipliers are better. It works fine for me and I also did it on some family members.
Sure you are being honest with the activity? Remember that it's continuous time and discludes breaks.
Quote:
Originally Posted by Keith  Take for example the scenario where I do 8 hours of light exercise and spend the rest of the day resting. That requires 5288 calories. My BMR is 2362. That's almost 3,000 calories below maintenance! That seems potentially unsafe. |
I highly doubt you do 8 hours of continuous light exercise. The initial calculation for this is
by minute so it does
not include taking breaks. If you really do nonstop excersize for collectively 8 hours in a day, 5288 seems perfectly reasonable, remember that the max includes your BMR. If you spent that 8 hours sitting, it would just show your BMR as your max. The minimum is not the amount you should consume, it is the minimum amount to be safe, do not consume less than that.
8 hours being 480 minutes, go to the site mentioned above and plug in 480 minutes and you should get similar results.