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RU4SCUBA's Photo RU4SCUBA SparkPoints: (0)
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7/19/09 1:30 P

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I use a 305 and feel the calorie information is fairly accurate as long as you keep your weight up to date in your profile.

When I'm trying to lose weight I religiously track calories in and out and the 305 seemed accurate enough to where the scale was moving right when it should based on my calories burned.



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MBSHAZZER's Photo MBSHAZZER Posts: 18,402
6/26/09 9:44 A

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I have heard that the rule of thumb is the 100 calories per mile is for a 150 pound person. Of course, like Gail & Nancy pointed out, in addition to your weight, factors such as your speed and general fitness level will change that number up or down.

The Garmin show me burning about 96 calories a mile. I assume that it is overstating the calories burned. It's a very inexact science.. I'd be happy to be the guinea pig on an experiment, too!

"Success is not final, failure is not fatal; it is the courage to continue that counts" - Winston Churchill

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SASULLIVAN's Photo SASULLIVAN SparkPoints: (0)
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6/25/09 8:59 P

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Thanks Nancy, I appreciate the information. I think my body has become more efficient at running therefore, I'm probably burning less calories than when I started. At least once a week I try to incorporate speed work, intervals or tempo runs. And twice a week I do circuit training and ride a spin bike. My cross training has been mowing the lawn once a week (it's a large lawn).

Suzanne

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SP_COACH_NANCY SparkPoints: (158,833)
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6/25/09 6:24 P

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Sas,

Just to add my two cents...

Caloric burn will vary from day to day of course activity to activity. It also depends on your current weight, the oxygen/carbon dioxide exchange and the time involved.

The more one does a particular activity (say running for instance) the more adapted the body becomes at doing the activity, therefore, the body burns less calorie the more one performs the activity (one reason why cross training and HIIT is important to ward off plateaus).

Therefore, I am burning on average 94 calories per mile today however that number was as high as 112 3 years ago when I started...the reason, my body has adapted to the sport so my pump (AKA heart) is a larger muscle to get the blood moving.

Nancy




SALTYCHOCOLATE's Photo SALTYCHOCOLATE Posts: 9,387
6/25/09 5:07 P

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I get the same discrepency between the fitness tracker and mapmyrun.com. Mapmyrun.com always calculates more calories than the fitness tracker. I've also checked out other online "calories burned" calculators. The fitness tracker is ALWAYS a lot lower than any of the online calculators. I'm pretty short so I don't know if the 100 calories per mile would be accurate, however, my daily run always includes very large hills so who knows. For example, I ran 7.8 miles today. mapmyrun calculated 717 calories, three online "calories burned" calculators calculated 600/606, the Sparkpeople fitness tracker calculated 444. Talk about discrepencies!

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SASULLIVAN's Photo SASULLIVAN SparkPoints: (0)
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6/25/09 4:56 P

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Thanks for the responses. I like the 100 calories per mile rule, especially when applied to a "regular" run, which today's was (regular as opposed to interval or tempo run.) I'm not going to adjust anything on my fitness tracker though. The calorie range seems to be working just fine for me.

I'm with you Gail, I would volunteer for any tests that would give an exact formula for this. In the meantime, I'll take what information I have and adjust whenever it makes sense to me.

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ANTHONYF's Photo ANTHONYF SparkPoints: (22,972)
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6/25/09 4:54 P

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Not too much yet, but here is a calculator that takes into account the heart rate.
I also saw some other info that says heart rate will affect calories burned. It has to do with what 'zone" you are in
www.braydenwm.com/calburn.htm
www.bellaonline.com/articles/art596.
as
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RHYNIC's Photo RHYNIC Posts: 19,646
6/25/09 4:39 P

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I really hate these questions because I don't know the answer. I would really like to have access to some science equipment and we could all get together for the weekend and once and for all answer the question. :-)

I go by the rule - which is no more accurate than any gym equipment, fitness tracker, or electronic device - 100 calories per mile. Some runners burn more, some less. More is burned if it's run fast, a little less is burned if you run slow...but fast to me and fast to you is not the same pace.

SO!!!

sigh - the best we can do is pick the number that seems to work best for us. I don't use my garmin. it always allows me more than 100 calories per mile. With 100 calories per mile I am able to track my calories and lose weight without feeling totally starved.

Sorry i couldn't be more help.

BUT, if ever you have access to a lab. I will volunteer.

gail

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ANTHONYF's Photo ANTHONYF SparkPoints: (22,972)
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6/25/09 4:32 P

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I checked a couple other places and the 495 is closer it seems.
The only thing is that none of the calculators take into account the heart rate. I am not sure how much of a factor HR is, ie how much it would change the calories.

This above all: to thine ownself be true.
Lord Polonius. Act 1 scene 3. Hamlet


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SASULLIVAN's Photo SASULLIVAN SparkPoints: (0)
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6/25/09 4:23 P

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I have a question. I recently purchased a Garmin Forerunner 305. There is a significant difference between the calories burned on the Garmin than what the Spark Fitness tracker records.
Garmin: 720 calories (54 min., avg pace 8:53, 6.08 miles, avg HR 154 bpm)
Fitness tracker: 495 calories (9 min pace, 55 min.)
Which is more accurate?

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