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CBSquared

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 #1 

Thanks for taking the time to read this.

We did a 5-1-5 test recently and at first I thought it was just a little 'noise' in the data.
Looking at it again:

  • the data has much larger delta's than I have seen in the past 'noise' in signal
  • smO2 and thb rise and fall 'large' amounts in unison
  • smO2 changes roughly 10% to 20% periodicaly
  • the period of the rise and fall is fairly regular - oscillating
  • a similiar trend can be observed in the left arm on a 2nd Moxy
  • It's not really apparent in the BsX sensor on the left VL

Then the test subject called later and said he was having significant muscle spasms all afternoon.  
Primarily concerned that this could be something else aside from noise in the data.

Any input would be appreciated.


Subject was: male, 47, 78 kilos, fit cyclist

For the 5-1-5 test:
1 - Moxy on Right VL
2 - BsX ON left VL
3 - Moxy on left Bicep
4 - Optical heart rate monitor on arm
5 - Chest electrode hr monitor
6 - Wahoo Kickr ERG trainer
7 - Power from left crank Stages power meter

Moxy is configured in 'default - 2.0 sec update, data smoothing' mode

TonyH.png



 
Attached Files
zip th_-_5-1-5.zip (607.22 KB, 2 views)
csv th_-_arm.csv (331.15 KB, 3 views)
csv th_-_bsx_-_ll.csv (346.64 KB, 3 views)
csv th_-_moxy_-_rl_-_vl.csv (276.62 KB, 7 views)

Roger

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 #2 
We've seen this type of ~30 second period oscillation before.
http://forum.moxymonitor.com/post/short-workout-suggestion-based-on-515-assessment-7015343

It seems to be a physiological phenomenon.
CBSquared

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 #3 
Great Thanks - I didn't remember seeing that one.
Kirill

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 #4 

While I have little experience with the device.
But I got the impression that a strong overeating causes large fluctuations in performance and reduces SmO2 and Thb.

Fluctuations can occur even on a pulse oximeter with overeating.

I have tried to train on empty stomach or eating 400 grams of oat biscuits, 350 grams of marmalade, and even then the time. All this causes sharp peaks on record Thb. So is a lot of fatty foods (200-400 grams of bacon) give such effect.

In the past, I have the experience of eating at a trip to the diner 12 hamburgers, cola, nuggets 20, 2 Big Mac. 1 meal = 5600 cal.

320)340w 5-10-15-20-25 - 22.02.2017 4-56 - Kirill_NOFOOD.jpg  320w 5-10-15-20-25 - 20.02.2017 20-49 - Kirill_OVERFOOD.jpg 


Kirill

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Posts: 94
 #5 
"Then the test subject called later and said he was having significant muscle spasms all afternoon."

maybe he should try to make the electrolytes?
Roger

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Posts: 266
 #6 
I'm not sure if this paper is relevant to the oscillation discussion or not.  I just read the abstract.

http://proceedings.spiedigitallibrary.org/proceeding.aspx?articleID=2620153
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