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Fitness Theory and Practice. CrossFit's rationale & foundations. Who is fit? What is fitness?

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Old 09-25-2007, 11:18 AM   #1
Brent Lucas
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FitDay - Caloric Burn Estimates WHACKY?

I saw a link for FitDay here and have been using it for the alst 3 days with great success. It has verified my diet for me and helped with my nutrient counts.

I think the assesments in the Activities section might be a bit off however...


This is the workout I did today:

Row 2500M
10:27 AVG 2:04 per 500M

Run 3X 100M sprints

Row 1000M
4:14

Run 2X 100M sprint

Row 500M
1:59

1X 100M sprint

DOH! Entered as 1 HOUR:40 minutes
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Last edited by Brent Lucas; 09-25-2007 at 11:32 AM..
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Old 09-25-2007, 08:22 PM   #2
Matthew Townsend
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Re: FitDay - Caloric Burn Estimates WHACKY?

This morning, I:
- warmed up for 10 minutes;
- did 30 lots of 50kg snatches (23 minutes); and
- 25 pull ups.

My polar heart rate monitor suggested I had burned 9 calories.

Fitday suggested that I had burned 270 (30mins of circuit work * 9 calories).

Which one should be preferred?
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Old 09-25-2007, 09:52 PM   #3
Steven Low
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Re: FitDay - Caloric Burn Estimates WHACKY?

Er, does it really matter that much?

Not to be annoying or anything but as long as your diet is regulated you can tell where you're at by if you're losing/gaining weight. It's much more accurate to look at calories in terms of your weight vs. your caloric intake than to try to do fancy calculations of "how many cals am I burning off and how many do I need to ingest to do ____". If you start losing weight you need to add more food and if you start gaining weight you need to lower caloric intake (unless you were trying to gain weight). That's all there is to it.
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Old 09-26-2007, 05:43 AM   #4
Brandon Oto
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Re: FitDay - Caloric Burn Estimates WHACKY?

There is no way a generic FitDay estimation for something like "circuit work" is going to accurately estimate output from a WoD.
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Old 09-26-2007, 08:13 AM   #5
Jason M Struck
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Re: FitDay - Caloric Burn Estimates WHACKY?

my favorite compromise so far is the Polar.

it ain't perfect, but at least it's several of the most important variables... sex,age,BMI relative heart rate...
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Old 09-26-2007, 10:06 AM   #6
Brent Lucas
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Re: FitDay - Caloric Burn Estimates WHACKY?

Quote:
Originally Posted by Brandon Oto View Post
There is no way a generic FitDay estimation for something like "circuit work" is going to accurately estimate output from a WoD.
That's for sure..

I find it's OK for running or rowing, (now that I am entering stuff right LOL) but there isn't anything in there that captures the WOD.

Even trying to combine excercises and estimating I haven't come up with anything that looks reasonable.
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Old 09-26-2007, 05:06 PM   #7
Aileen Reid
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Re: FitDay - Caloric Burn Estimates WHACKY?

There is an article somewhere on the net about using a Polar to estimate weight training calories. Basically it says becuase of the way it works, and the way you do weight training it doesn't provide a good guide. And for various other reasons it says don't count cals for this type of stop start activity. However for cross fit I think there has to be a compromise becuase of the cardio component in many of the W/O.

Also remember if counting cals burnt, DEDUCT your RMR cals off the exercise total cals. Most people don't do this, its seldom mentioned and leads to overestimation.
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Old 09-26-2007, 05:36 PM   #8
Matthew Townsend
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Thumbs up Re: FitDay - Caloric Burn Estimates WHACKY?

Quote:
Originally Posted by Brent Lucas View Post
That's for sure..

I find it's OK for running or rowing, (now that I am entering stuff right LOL) but there isn't anything in there that captures the WOD.

Even trying to combine excercises and estimating I haven't come up with anything that looks reasonable.
Yes, but I reckon the Fitday estimation (for yesterday) is actually more accurate than the polar. For instance, I ran about 8.5ks this morning. My polar told me that I had burned about 430 calories.

While I reckon that's probably about right, I feel more sore (DOMS) from yesterday's weightlifting routine. Certainly the ongoing impact of yesterday's WoD is greater.

I guess the moral of the story is that there is no reliable guide and that I am going to have continue estimating. That's cool, as long as I know.
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