Sleeping heart rate...

Right, last night I got over the 'running nerd' stigma and wore my HRM to bed. Now it stopped recieving a signal after 2 hours, due to the bedding getting in the way, but I'm pretty sure I hit REM by this point anyway. The lowest HR reached was 35. Now, I'm no expert on HRM's... is this the value I use as my resting HR when calculating my HR reserve? If so, the values I would have to use are:
Max HR: 225 (Not a fault, measured on several occasions! Once when nearly ran over, twice at the end of a race)
Resting HR: 35 (obv.)

HR reserve = 225-35 = 190
Therefore easy run = 158 to 170. This doesn't feel like an easy run!

Wheres the error? Are the 225 (I'm 21 by the way) readings artifacts? The highest I got in my Mile reps yesterday was 185, but thats no a good measure either. Should I use 200 as my max value?

Brain hurt. Must stop thinking!


  • drewdrew ✭✭✭
    KK, I've got similar problems. I've also worn my HRM when sleeping and it dropped to about 35, but on a day to day basis it rarely gets below 38. I tend to use a figure of 39 as it more accurately depicts day to day life. As for MHR. 2 years ago I managed to reach 181 but since then have peaked at 173, no matter how hard I try.

    If I use 181 in my calculations then my 10k HR equates to only 84% WHR, whereas using the 173 figure it's 88%, which is more in line with what I would expect.

    Using your day to day experiences provides figures that are more in line with what you would expect
  • KK

    How are you calculation easy run? In my book an easy run is somewhere around 60% i.e. 190 x 60% = 114 + RHR (35) = 149. Have I missed something?

    If the 225 has been measured twice then I would say that is reasonably accurate, however it seems a little perplexing that you "only" achieved 185 during reps, whereas you might have expected something around 200. If 225 is your reliable max then 185 would be more like a tempo rate. Have you tried testing your max with another HRM?

    I agree with Drew and would tend to not use a "sleeping" RHR but a "just woken up". However, there probably isn't a significant difference between the two?
  • Well using the aobve logic, my waking RHR = 37.
    Having said that MartinH, your maths are far better than mine. I was doing mine in 'me ead' so to speak, so all figures were approximations. Your 149-177 range makes a lot more sense now. Looking at my mornings run tho, my average HR was only 140. Should I have been working harder for an easy run?
    I think I'm going to reperform my Max stress test to get a decent reading. Then the values might mean something, hopefully... (For now Im just gonna use the 220-age formula (i.e 200))
  • PS Thanks for the input guys, also, using 200 as my max, the 185's I observed yesterday represent 90-95% max HR, which mathces the percieved effort more closely. Things make much more sense when you stop to think!
  • KK - I don't believe the 220 - age is at all accurate. My age related max is 183, actual max 195
  • Cou;d be HRM related faults i.e. I read about ghost readings when going near active zebra crossings/power pylons etc. Going to perform a max stress test (never actually done an official one), next week to get a bettr idea...
  • 220 - your age is not a good way of measuring your HR. I use a method called the Karnoven method....
    The equation is as follows.
    Working HR=(Max HR-Min HR) x % effort) + Min HR.

    Heres an example.....
    Joe Bloggs Max HR 200
    Min HR 50
    If you want to work at 50% effort....
    200-50 x 50% +50
    = 150 x 50% +Min HR
    =75 + 50
    = 125 BPM.

    Look the method up on the internet if you want an explanation but trust me it is a lot more accurate than 220 - age.
  • Ignore my ramblings....obviously the 90 min run I did this morning has affected my ability to read you are already using that method.
    When you meet me if you ever should, you have my permission to slap me...HARD!!
  • KK - I'd have thought your 225 readings were almost certainly due to electro-magnetic interference - I get a massive 238 on some days running under a railway bridge, but I know there are a lot of hidden sources of interference as well (trials of running in a big city, I guess).

    According to a pretty useful site I was looking at yesterday(, even young male Elites tend to have an MHR of only around 200, and I've seen this figure quoted before.
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