Talk:Heart rate

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Contents 1 Training Zones 2 Resting HR decreases with age? 3 Measuring HRmax 4 MHR revisited 5 Body temp & heart rate 6 Restructuring this article -- lots of info 7 MRHR 8 Possible copyvio

[edit] Training Zones

Can people give examples of how training zones are applied in real sports and the like? [[User: This paragraph seems misleading to me, as it makes people think that by doing a low-intensity exercise they will burn more fat than by doing medium/high-intensity activities... Calories burnt in the unit of time is what matters. Low-intensity training is useless, as you will burn less calories and even if you burn 80% fats, food will replace them.

{I agree with the above paragraph that Calories burnt per unit of time would be an important addition. I dissagree with his statement that Low-intensity training is useless. I have done both and found low intensity more successfull at losing weight, and higher intensity better at increasing fitness and endurance. RWP}

The person above that said he/she lost more weight with low intensity is completely wrong. as stated above, what matters is the calories more minute, therefore, the higher the intensity the more calories expended, the more weight is lost!

Could a definition of Resting Heart Rate please be added? Specifically, I am wondering if this is the minimum rate when waking up, or the rate sitting quietly, or laying down quietly. Thank you.

In the section on MHR, there is written ``Swimming - 14 beats lower ... because the body is partially supported. I believe this is NOT true for swimming. In swimming you do use all your body, that's not the same as cycling or rowing. I believe the cause is the ,,mamals diving reflex instead. Human's heart rate slows down each time we get into the water in order to save oxygen when we dive under the water. I'm not a medician, so please check this with someone experienced before making a correction, but the difference (2/3 rowing, 5/6 cycling and 14(!) swimming) seems enourmous to me and I know about the mammals diving reflex, so I suspect this is related. User:hhanke

This information came from [1]. To quote:

Londeree and Moeschberger also looked at other variables to see if these had an effect on MHR. They found that neither sex nor race makes a difference. However, MHR does vary with activity and fitness level. Studies have shown that MHR on a treadmill is consistently 5 to 6 beats higher than on a bicycle ergometer and 2 to 3 beats higher than on a rowing ergometer. Heart rates while swimming are significantly lower still, around 14bpm, than for treadmill running. Running and Versaclimber [4] show similar MHR. Londeree and Moeschberger also found fitness levels lead to a variation in MHR.

Johnteslade 07:36, 3 Jun 2005 (UTC)

This looks like a mistake in the source. "5 to 6 beats higher," "2 to 3 beats higher," "significantly higher still" would make more sense, grammatically and physiologically. This "fact" shouldn't be used unless it's confirmed by another independent source. 67.168.216.176 03:04, 7 December 2006 (UTC)

[edit] Resting HR decreases with age?

Does anybody have any sources on this? I used to work on a geriatrics ward, and the resting pulse rates were anything from 40 to 120... admittedly they were PRs not HRs, but I wouldn't expect there to be such a huge difference between the two; and if there is a difference then PR must be less than HR. I'm willing to accept that I could have just worked on a freakish ward, but I would like to see some sources for the info!!! I know that the HR decreases from neonate until the end of adolescence, but I haven't seen any specific research about where it goes after that...--John24601 21:21, 23 January 2006 (UTC)

[edit] Measuring HR_max

The article gives Edward's formula as

For males: 210 - 1/2 your age - 1% of total body weight + 4 = HR_max

For females: 210 - 1/2 your age - 1% of total body weight + 0 = HR_max

But the Heartzones website gives

For males: 210 - 1/2 your age - 5% of total body weight + 4 = HR_max

For females: 210 - 1/2 your age - 5% of total body weight + 0 = HR_max

and makes it clear that weight is in pounds.

[edit] MHR revisited

The maximal heart rate is lower for cycling and swimming as stated above. This is due to the number, size, and resistance(or power) of the muscle groups involved. Treadmill is higher because there is high resistance and large muscle groups. Swimming is lowest because although more muscle groups are involved, the resistance that each meets is significantly less than cycling or running (especially uphill). It is my opinion that the target zone does not need to change in exercise on a bicycle or whilst swimming, since it is cardiac specific and not exercise specific. The MHR is calculated whilst running uphill or on a treadmill with incline (after attaining 80-90% MHR on level or slight incline) in order to use the 'target zone' formulae. Unfit people are unlikely to attain their MHR on first attempt at these tests (it takes a degree of stamina to keep running anaerobically up a hill at 100%MHR, typically for 2 minutes at the end of the test, which follows several minutes of 85%MHR) Zeitnot 19:29, 21 July 2006 (UTC)

[edit] Body temp & heart rate

change of 10 beats per minute in heart rate corresponds to the change of one degree Celsius in body temperature sounds like total hogwash to me. When I exercise, I can easily raise my heart rate by 100 beats per minute which according to this would give a a tempurature of 47C which according to Thermoregulation#Human temperature variation effects should result in my certain death.--JBellis 18:31, 29 October 2006 (UTC)

Is it perhaps that cause and effect are reversed in the above paragraph? Is the article perhaps saying that an increase in body temperature of 1 degree Celsius would cause an incease in heart rate of 10 bpm assuming that all other factors remain the same.

---

Steve F.

[edit] Restructuring this article -- lots of info

I just added the restructuring template for this article because, after reading it over, there is a lot of information that is not very well organized. Things like max heart rate, training heart rate, and resting heart rate, for example, could all be organized under an umbrella topic section (cardiovascular health?) and, after a brief definition, could be described in relation to each other towards edification for someone who is not very familiar with any of the seperate topics. Rhetth 01:00, 29 December 2006 (UTC)

[edit] MRHR

I removed this section: A more reliable MHR (Maximum Heart Rate) calculation is based on the MRHR (Morning Resting Heart Rate) and your age. MRHR is an average of 3 or more samples of your HR at the moment you wake up from a normal sleep cycle. MRHR is used to calculate MHR. Polar has a free web service that will calculate your MHR based on your MRHR and your age [2]. because:

• it doesn't make sense without using the polar website
• using that calculator on the polar website simply calculates MHR = 220-age which is described elsewhere. The MRHR is used for calculating training zones but I think that it needs further reference.--JBellis 20:40, 18 January 2007 (UTC)

[edit] Possible copyvio

The section on training heart rates seems to be a paraphrase of other websites, changing "calories" to "food energy" (a weird way to phrase it), possibly to avoid being able to catch it by Googling for those phrases.

Anyone got permission or should I list it as a copyvio? --Frank Lofaro Jr. 16:55, 22 March 2007 (UTC)