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stress and body battery.

Adam
over 4 years ago

Hi

I'm an unusual case. I had a Bima heart bypass at 48 (52 now) That's when they leave the grafting and plug both chest arteries into the heart.

Supposed to have a pacemaker and beta blockers, Ace inhibitors. I have managed with none of these.

I bike about 100 miles a week, walk daily and have a Fenix 6 Pro.

My stress reading is usually just under 50. my body battery bombs to 5% and stays there.

But when the recent problems started, my stress levels dropped a little and my body battery would charge around 40- 50% sleeping. Would even go up while I was watching a film.

As of two days ago it's gone back to being stuck on 5%. Nothings changed I monitor my heart with medical equipment.

So while Garmin were off line my stress read about 20% lower.

However I know this reading to be far more accurate than the current (usual) readings.

Just thought I would post this as I can compare the Fenix to facts.

I use a chest strap when riding (dualhr) and it's about perfect, WHR struggles over 120 I find, it's quite accurate up to then.

Adam

  • 0 over 4 years ago in reply to Hexxer

    Good quality and duration of sleep is a big factor in getting to 100%. But no doubt there are other influences. For example, a high VO2max is taken to mean you can recover faster. Maybe resting heart rate and max heart rate also affect how charging and discharging rates are interpreted.

    I have VO2max of 46 at the moment (it has been higher, but I am just starting to ramp up training following injury and have a way to go), RHR of around 45 and MHR of 195. I guess if your fitness numbers are good then daily life (other than training) will not take a heavy toll and recovery should be quicker.

    And FWIW my life is very free of mental and physical stress. The only big hits are from exercise, but it does seem that as my fitness goes up (VO2max especially) so does my BB resilience and recovery.

  • Former Member
    0 Former Member over 4 years ago in reply to eezytiger

    Same here

  • 0 over 4 years ago

    Just to confirm. My heat beats all over the shop.. never seen 100% I think 87% is my record.

     It went from 5% to 28% on the second restart. Went down to 18 in the afternoon. Went up to 19 watching TV.

    After 6 hours fair sleep it's 59%

  • 0 over 4 years ago in reply to Hexxer
    Hexxer said:
    You get 100% Body Battery *wow*

    From 25% to 100% - 6h of sleep...Sweat smile

  • 0 over 4 years ago

    Hi Adam,

    In short, the Body battery looks HRV during sleep to recharge/increase. HRV is derived from R-R peaks in ECG, and with optical sensors / PPG sensors, they are able to, with relative accuracy deduce similar information under periods of low motion. Now, the PPG sensors are dependant on blow flow and essentially looks at how the volume of blood flow changes during/between heartbeats, this "pattern" of volume flow could be different with your heart condition, affecting the algorithm that deduces R-R / Beat-to-beat intervals from PPG signal, possibly pick-up shorter RR intervals and thereby reducing the HRV dramatically to a point where the body battery solution might think that you are stressing while you are resting. To validate this argument, you will need a Digital Signalling Processing engineer to look at the raw data, which is probably out of the question. These are edge cases, similar to users with Afib, so it might be that Garmin's algos are not dynamically changing their thresholds to accommodate anonomlies.   

  • 0 over 4 years ago

    I have been the owner of FR945 since November and I have found that the body battery reflects my shape very faithfully, I reach 99/100% quite easily in the morning as soon as I wake up, on days when I feel tired, slept badly or with a cold the score is low, I'm very happy with this feature