Last 4 Hours heart rate widget doesn't reflect running HR recorded with chest strap

Recall this came up before and think the "answer" was that the graph just shows your HR at discrete intervals and so may have "missed" your 197. How long were you over 191 for?

Like Tim said, the widget uses the "Heart Rate History" where the HR is only saved every minute or two, so if the max for a workout didn't occur right when a reading was saved, it won't show in the widget. The widget is really just for the 24/7 HR and not activity details.

This is one of those classic inconsistencies, lack of attention to detail if you wish, that Garmin routinely displays.

Imagine that you are a simple or beginner user who has no clue about HR sampling intervals, etc. and your HR widget shows you HRmax1 but the activity summary page shows you HRmax2 for the same time period. What would that person think?

I think that Garmin needs to take a step back and reevaluate their strategy about accurate data capturing *and* displaying across and within their platforms. My opinion is that they are losing trust which is very hard to regain.

Losing trust with who?

It is not British Airways!

Recall this came up before and think the "answer" was that the graph just shows your HR at discrete intervals and so may have "missed" your 197. How long were you over 191 for?

about 2 min 15 sec

Like Tim said, the widget uses the "Heart Rate History" where the HR is only saved every minute or two, so if the max for a workout didn't occur right when a reading was saved, it won't show in the widget. The widget is really just for the 24/7 HR and not activity details.

hmm I thought the forerunner 935 was supposed to be sampling every 1-2sec even in 24/7 HR mode?

Even if it only plots 1-2 min at a time you'd think they'd want to preserve the extremes recorded for each 1-2min bucket.

Recall this came up before and think the "answer" was that the graph just shows your HR at discrete intervals and so may have "missed" your 197. How long were you over 191 for?

2min 15 sec

also speaking of garmin "bugs", i posted this before my reply to jim_m_58. Then after I replied to jim_m_58, i saw my reply to jim_m_58 but I didn't see this response to TIMGROSE. So now I am posting again. Probably when I check later I will see all 3 posts haha

Even if it only plots 1-2 min at a time you'd think they'd want to preserve the extremes recorded for each 1-2min bucket.

You'd think that would be the obvious solution....

Guessing what happened here is nobody ever expected users to compare activity data with the HR graph, or to care about discrepancies.

hmm I thought the forerunner 935 was supposed to be sampling every 1-2sec even in 24/7 HR mode?

Even if it only plots 1-2 min at a time you'd think they'd want to preserve the extremes recorded for each 1-2min bucket.

There's things saved for syncing and things saved for displaying (in the widget, etc). What's saved for the widget is only every minute or two. Otherwise there's be far too much data to display on the watch screen. The number of samples saved for display (if it's like the other watches and likely is) is actually the width of the graph that the widget displays, so for example, on a va-hr, the screen is 148 pixels wide, and there are 148 samples saved in the history.

Saving the max over time when there is no sample it's tied to would make it hard to see when that max decreases, as it's not tied to a specific sample, so no way to tell when it "rolled off the end".

As was already said, the wohle 24-hour heartrate graph seems to be stored approximately for every minute (so ~1440 samples/day). Each of these samples is not the highest value occurring in the respective 1-minute period but rather an average over it. I'll check this after my next run and have a look at the data in detail. To be honest, I find it makes sense. The 24-hour (and 4-hour) plot are supposed to give you a rough overview, and very short HR spikes (most probably due to OHR detection problems) would only detract from that purpose.