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AMKELLY8's Photo AMKELLY8 Posts: 202
5/29/09 11:45 A

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So, what is the average amount you'll burn in any of the levels?

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LOVINMOM's Photo LOVINMOM Posts: 390
5/28/09 9:10 P

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FREE, that is very interesting and makes me feel much better! thanks for sharing!

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FREESPIRITME's Photo FREESPIRITME Posts: 565
5/28/09 4:36 P

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I'm looking for a HRM as we speak. Did a search on SP for "heart rate monitor" and found this info, which I found really interesting and want to share. (I agree that HRM probably should go back, that's not what I'm saying with this post.) My question is, could this possibly be why Jillian's DVD doesn't read right? What do you think?

A HRM won't give you an accurate idea of how many calories you burn during strength training, because the relationship between heart rate and calorie expenditure is not the same during strength training as during cardio exercise, which is what the HRM's estimate is based on. Unless your weight training is very vigorous circuit training, the heart rate monitor will be overestimating your calorie burn by a fair amount.

The problem is a technical one. Calorie burning isn't determined by heart rate, it's determined by the number of muscle cells that are activated to perform a given activity. It's the working cells that actually use the energy (calories) and consume oxygen. When working muscle cells need more energy and oxygen, your heart rate goes up to deliver these things to the cells via the blood stream.

Any muscle that performs a high intensity or maximum effort (strength training) will trigger an increase in heart rate and blood flow. But if only a single muscle group is on the receiving end to utilize that extra oxygen (doing a strength exercise that isolates your biceps, for example), only a relatively small amount of oxygen (and calories) will actually be consumed.

So while a series of strength training exercises may elevate your heart rate like aerobic exercise does, you're not actually using as much oxygen and burning as many calories as you would be if you were steadily using several large muscles all at once, as when walking, running, swimming, or doing aerobics for example.

The heart rate monitor doesnt know whether your increase in heart rate is due to several large muscle groups working (cardio), an isolated muscle group lifting a weight (strength training), or even if adrenaline or excitement is increasing your heart rate. It just knows your heart rate, and the formulas it uses to estimate calories are based on studies of aerobic exercise, not other activities. So, it's going to overestimate your calorie expenditure when the rise in heart rate is stimulated by using isolated muscles at maximum intensity, which is what occurs during strength training.

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FLGIRL_4EVER Posts: 7,830
5/28/09 2:54 P

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I bought a heart rate monitor from Wal-Mart also called Sportline SX (I would love to have a Polar, but financially at this time can't afford it), I have worn it and it seems pretty accurate. I do the Shred (modified with wall push-ups and struggle with crunches) I burn 260 calories. I would take your monitor back, I agree with everyone else there is no way you burn just 60 calories.

Edited by: FLGIRL_4EVER at: 5/28/2009 (14:56)

HOMIELUVRFRND's Photo HOMIELUVRFRND SparkPoints: (16,976)
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5/28/09 1:31 P

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I am with the other ladies, I say take it back and try another one.
Jillian is a BEAST, I know your burnin up at least 10 times that amount of calories. So don't be discouraged, even if your heart rate monitor isn't registering it, your body is.

Each one reach one, then no one will be left behind; we are in this together, and it's not just about weight loss, it's about life.

Nov 3rd 2010 thru Nov 3rd 2011, a day NOT exercised to my BEST potential is a day I SIMPLY wasted.

"Use what you got to get the body you want, no equipment, no excuses. Walking is free." My personal quote when all I could do was walk.

Come on, let's do it together.


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LOVINMOM's Photo LOVINMOM Posts: 390
5/28/09 9:24 A

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I have the same monitor and for leslie sansone video it is just about right on with sparkpeoples calorie count and when I do Jillian's No More Trouble Zones it also only registers twenty even though when I take my pulse it is at the very top of my target rate. who knows?

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CHRISTIEC73's Photo CHRISTIEC73 SparkPoints: (0)
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5/27/09 9:39 P

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I agree it must be broken. I would think that at your weight if you are working hard you should burn at least 200 for 30 minutes of a Jillian cardio workout (like BFBM) maybe a bit less for a weight work out like NMTZ. I have the Polar F6. It works like a charm and I love it.

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I*AM*BLESSED's Photo I*AM*BLESSED SparkPoints: (101,346)
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5/27/09 3:43 P

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Jodymarie:

I, too, have a Sportline and I am burning anywhere from the high 200's to the mid 300's with the 30 Day Shred. I would take back the HRM and get another one.

Edited by: I*AM*BLESSED at: 5/27/2009 (15:44)
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MICHLUVSBOSTON's Photo MICHLUVSBOSTON SparkPoints: (40,541)
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5/27/09 3:26 P

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I agree with you, that can't be right...if you're truly working hard and sweating buckets and doing what an hour or 30 minute dvd...you have to be burning I would think at the very least 200 calories.
I think you're monitor is not working...I am saving up for a Polar one, from all I read here, they're pretty good.
-michelle



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REBYTR's Photo REBYTR Posts: 1,297
5/27/09 3:24 P

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60 calories couldn't possible be right regardless of your age or size during a Jillian Michaels workout. It looks like maybe your monitor isn't working. Maybe manually take your pulse while working out and see how close it is to the monitor.

Melissa, from Texas


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SHRINKINRUNNER's Photo SHRINKINRUNNER Posts: 6,460
5/27/09 3:14 P

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Hey everyone! I just had a quick question I would like opinions/answers on!

Why is it my HRM reads I burn so low amount of calories when I do Jillian?!! I am dripping sweat usually and I know sweating doesnt mean alot but my HRM says for 30 mins I burned 60 calories. I burn more when I do just a walking dvd, and it usually reads more then 60 calories when I do those. I dont have an expensive HRM its just a cheap walmart one called Sportline. Any help would be nice...it bugs me and discourages me when I look at it an see only 60 damn calories!!!

**Jodymarie**

"For I know the plans I have for you," declares the LORD, plans to prosper you and not to harm you, plans to give you hope and a future." Jeremiah 29:11


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