How does the body respond to stress?
Below I look at heart rate variability (HRV), heart rate, and glucose in response to two very different weeks (N = 1).
High vs low stress:
Some context first
Last summer in July I had a strong negative stress response (cumulative stressors), resulting in arrhythmia and concerns for my health I've talked about this before, but here I want to focus on what happened to glucose during that week.
Coincidentally, I was wearing a continuous glucose monitor (CGM) since the previous week and noticed that after meals, my glucose was spiking really high, near 200 mg/dL, consistently.
Very interesting to see poor regulation at work so clearly.
As usual, I was also monitoring my resting physiology (HRV and HR) using HRV4Training (morning measurements), and saw quite a dip in HRV, as well as a minor change in heart rate This is the type of stress response I often discuss (see for example my guide here)
Physiologically, we know that high stress is associated acutely and chronically with elevated glucose in the bloodstream and reduced parasympathetic activity Pretty neat to see it with simple measurements and currently available technology.
"If you've ever wondered how to tap into the secrets of how that pump in your chest can help you to train faster, harder and longer Marco is just the man to listen to."
“We've been using Marco's app for a while to understand how to better regulate training and recovery and in this episode we do a deep dive on the how and why”
I’ve really enjoyed talking to ultrarunners Jay and Tris about HRV, thanks for having me!
In this interview, we cover:
Thank you Kieran for having me on your channel
Excited to announce that I am joining the editorial board of IEEE Pervasive Computing Magazine
I will take a role as editor for the Wearables Department together with Lucy Dunne
Our first editorial should be out soon sometime soon