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Old 01-29-2008, 08:46 AM   #11
Greg Light
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Re: 92% heart rate during the 2nd - 5th k of a 5k

Kudos for actually trying to measure your max heart rate instead of using a ridiculous formula, but I would guess that you have slightly underestimated it.

If you are at your max heart rate, you will most likely pass out or come pretty close to it. As a rule of thumb, I would add about 5 bpm to what you currently think your mhr is.

Also, max sure you calculate your %s based on the forumla someone stated above.

Max - Min = Range

Min + (Range * %) = Target HR at Target %

So for example:

Min - 50
Max - 200
Range - 150

HR at 90% = 50 + (150 * .9) = 185 as opposed to the 180 fom the "standard" formula
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Old 01-29-2008, 06:44 PM   #12
Franklin Shogie
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Re: 92% heart rate during the 2nd - 5th k of a 5k

my wife has low blood pressure. she actually gets headaches and light-headedness because of it.

she does a spin class 3X a week. In the class she puts the resisitance to level 10 so she can "feel the burn". Her heart rate as measured by a a Polar heart rate monitor goes above 210bpm during the high-intensity portion of the spin class. She feels no discomfort with the heart rate so high. It has caused concern for the spin class instructor because according to the heart rate chart, my wife should have a heart rate somewhere around 170bpm.

One other factor; within a minute of finishing the the spin class, though she may be soaked in sweat, her heart rate drops below 100bpm.

Do you think that her exertions are bad for her and contribute to her "low" blood pressure?

Doctors have examined her and don't have any answers.
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Old 01-30-2008, 08:52 AM   #13
Matt DeMinico
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Re: 92% heart rate during the 2nd - 5th k of a 5k

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Originally Posted by Franklin Shogie View Post
my wife has low blood pressure. she actually gets headaches and light-headedness because of it.

she does a spin class 3X a week. In the class she puts the resisitance to level 10 so she can "feel the burn". Her heart rate as measured by a a Polar heart rate monitor goes above 210bpm during the high-intensity portion of the spin class. She feels no discomfort with the heart rate so high. It has caused concern for the spin class instructor because according to the heart rate chart, my wife should have a heart rate somewhere around 170bpm.

One other factor; within a minute of finishing the the spin class, though she may be soaked in sweat, her heart rate drops below 100bpm.

Do you think that her exertions are bad for her and contribute to her "low" blood pressure?

Doctors have examined her and don't have any answers.
Sounds to me like she's extraordinarily healthy. And I've never heard of low blood pressure being a health problem. My mother has been tested at something like 80/50 I think. I've seen mine down at like 90/60 or something like that. And my wife has low blood pressure too.
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Old 01-30-2008, 09:57 AM   #14
Steven Low
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Re: 92% heart rate during the 2nd - 5th k of a 5k

Fitness + *extremely* low BP might be because of dehydration
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Old 01-30-2008, 10:47 AM   #15
Gant Grimes
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Re: 92% heart rate during the 2nd - 5th k of a 5k

It's possible. I measured my (running) max HR at 200, and by measured I mean I increased the speed and incline on the treadmill until my HR wouldn't go any higher (I like the cheap, direct approach). My average (cycling) HR during mountain bike events would be 176 bpm over the course of an hour or more. That's 88% max. When you're not coasting, your climbing, cornering, or passing, which puts you at 185-190+.
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Old 01-30-2008, 11:40 AM   #16
Tom Rawls
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Re: 92% heart rate during the 2nd - 5th k of a 5k

HR max differs depending on the activity. Thus if you want to train by HR, you should determine max HR for the specific sport. Doing a max HR test is seriously uncomfortable.

Elite athletes with whom I am familiar use HR as a proxy for blood lactate levels. They get blood lactate tests and correlate levels with a specific HR. Using HR is better than getting stuck with a needle every time you train. They use HR to ensure they are training at the prescribed intensity for the day's workout.

HR seems to be most useful for endurance athletes who do high volumes of training, Lance Armstrong being an example. Elite rowers are another example.
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Old 01-31-2008, 12:26 PM   #17
Franklin Shogie
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Re: 92% heart rate during the 2nd - 5th k of a 5k

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Fitness + *extremely* low BP might be because of dehydration
Fit she definitely is. She is also a very good athlete. She was a ranked national volleyball player for her country. She wasn't picked for the national team because of her height (she is but 1.6m) although she could sky like Spud Webb the basketball player. wfs link

and she can definitely soak a shirt with sweat when she works out.

I once did a Crossfit workout (Helen) with her and she was finished and recuperated before I finished the workout. My time was 17:35.

It was then that I learned about her athletic past.
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Old 02-04-2008, 06:37 PM   #18
Dan Hollingsworth
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Re: 92% heart rate during the 2nd - 5th k of a 5k

Franklin,

You may want to check her HRM. To be over 200 and to recover 100 beats in one minute is beyond amazing. My wife had the same issue with her HRM. Even during a warm-up she would have spikes over 200bpm and then turn around and be at a recovery heart rate in very short order. It's wasn't due to the fact that she was superhuman, her chest strap wasn't fitting very well.

Not saying that your wife isn't extraordinarily fit, but that does seem a bit odd to me. Maybe I'm just jealous.
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Old 02-06-2008, 01:29 PM   #19
Jared Ashley
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Re: 92% heart rate during the 2nd - 5th k of a 5k

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Originally Posted by Matt DeMinico View Post
And I've never heard of low blood pressure being a health problem. My mother has been tested at something like 80/50 I think. I've seen mine down at like 90/60 or something like that. And my wife has low blood pressure too.
I actually have heard of that, but it's more like a genetic defect than just "low blood pressure" by itself. You know how you can get dizzy if you are lying down and stand up real fast and hold your breath? I know a man who has blood pressure so low he can pass out just getting out of a chair. He is otherwise healthy and fit, has no known heart problems and has seen multiple specialists... they concluded he just has dangerously low blood pressure when at rest (there was a reason which I do not recall), and actually told him to increase his salt intake and gave him medication to RAISE his blood pressure to normal levels. Weird, but it's worked...
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Old 02-07-2008, 12:54 PM   #20
Pat McElhone
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Re: 92% heart rate during the 2nd - 5th k of a 5k

I now believe heart rate monitors are useless as a training tool. They are useful for seeing your heart rate and that can be interesting, but beyond that.....useless. That said, I am 34 and have owned a various form of Polar Heart Rate Monitor for the past 17 years (Wow, I have spent half my life owning one). In that 17yrs, my max heart rate has gone from 211 to 209 the last time I checked (I stopped using it to train with over a year ago).
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