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Jet Lag Advisor

Jimmyrn85
1 month ago

Hey all,

I want to use the jet lag advisor because I travel a reasonable amount.

Sometimes I work night shift whilst I am away, I have changed the time sleep mode schedule via Garmin Connect when I'm working nights. 

Does the jet lag advisor take into account that I'm working nights and therefore adjust its recommendations according to that?

  • 0 1 month ago
    Jimmyrn85 said:
    Does the jet lag advisor take into account that I'm working nights and therefore adjust its recommendations according to that?

    The jet lag advisor uses HRV variations to detect your circadian rhythm and realign it with your target sleep schedule in a new time zone. So since your rhythm is influenced by your sleep patterns, your shifts are taken into account to some extent with this personalized algorithm. The recommendations are pretty generic though, so these won't take into account your shifts. But your acclimation level will.

  • 0 1 month ago in reply to Etupes25

    , do you have links to sources that mention using hrv variations in the Jet lag advisor? I haven't found any that would have gone that technical. It would be nice to learn more.

  • 0 1 month ago in reply to Bitti

    I don't have links stating that Jetlag advisor uses HRV, but links that explain that JetLag advisor looks at the "circadian rhythms", "body cycles" and "sleep history".

    www.garmin.com/.../

    In parallel, a blog from Firsbeat describes how stress and sleep baselines reflect adaption to jetlag and how the Firstbeat 24h life assessment HRV was used.

    https://www.firstbeat.com/en/blog/tips-for-beating-jet-lag/

    Finally, there are several research papers examining the link between HRV metrics and travel stress, quoted here:

    https://hrvtraining.com/2013/07/22/hrv-reflects-travel-stress/

    Apparently, the advisor piece (what to do when) is more mechanical and based on timing of flight, destination and known mitigators of jetlag (melatonie, exercise, light)

    https://www.frontiersin.org/journals/physiology/articles/10.3389/fphys.2019.00927/full

    Finally, DCrainmaker tested the beta of jetlag advisor, he indicated that the feature groundwork was laid for that ‘your data’ driven approach, allowing [Garmin] to have it start impacting components like Recovery Time, Training Readiness, etc…

    https://www.dcrainmaker.com/2022/10/garmin-athlete-sports.html

  • 0 1 month ago in reply to Etupes25

    Thanks. The only Garmin page with any details I've found is the one you've linked, and it states "Your regular circadian rhythm is recognized from your sleep history". Since the watch only has access to more or less continuous HRV during sleep anyway, the only reasonable use of HRV would be to analyze its changes during sleep (i.e., the watch has no proper access to 24h HRV like Firstbeat's assesment).

    But I think this means that we don't know if Garmin's Jet lag adivser only used detected sleep times for its "circadian rhytm" analysis, or if HRV plays an important role in other ways.

  • 0 1 month ago in reply to Bitti
    Bitti said:
    Since the watch only has access to more or less continuous HRV during sleep anyway, the only reasonable use of HRV would be to analyze its changes during sleep (i.e., the watch has no proper access to 24h HRV like Firstbeat's assesment)

    This is not correct. The watch is tracking your stress level during the entire day, using both HR and HRV. It can separate stress from external sources (like jetlag, etc) from the stress stemming from exercise. This is the underlying technogy that identifies physiological states, powers the body battery, etc.

    I am making the assumption that while the mechanics of jet lag advice is generic, the jet lag status bar is powered by the same metrics, based on the level of (non-execercise) stress over 24h compared with a baseline prior to travel.