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Written by Ada on 2025-01-11 at 01:48

I'm trying to understand something in the data that my garmin heart rate monitor returns when I do a run. I think it might be explained by breast movement, but I haven't been able to find any real conversation or research on the topic.

According to the monitor, I have a low ground contact time, which means that my running form is good. Yet my vertical oscillation measures really high, which indicates that I'm moving up and down too much, and waste engery. ie, it means my running form is not good.

Now, I know for a fact my form is pretty good, and subjectively, I don't feel like I'm getting a large amount of vertical movement when I run. Yet the data has been consistent...

It's occurred to me though that the movement of my breasts is likely physically jostling the hrm sensor as I run, making my whole body vertical movement measurement inaccurate. It also makes me wonder whether it's impact my perceived ground contact time too?

Yet the only discussions I can find on the topic are how breast movement impacts actual running performance, rather than the accurate measurement of it with heart rate monitors.

Are there any runners out there that can confirm if I'm on to something here, and if so, what I can do about it to get accurate measurements?

[#]running #garmin #heartratemonitor #womensrunning

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Written by Bob Gray on 2025-01-11 at 19:34

@ada Does the amount of vertical movement stay the same when you change bras? Perhaps you need a different bra when you run, to minimize movement. It may just be that your "favorite" bra does not provide enough support and allows your breasts to move too much.

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Written by Ada on 2025-01-11 at 20:25

@noeman5@mastodon.social I've never done a direct comparison of how a particular bra impacts the issue, but it occurs on all of my runs, whatever bra I'm wearing.

It's not going to be possible to get a bra that completely stops all movement, but someone on lemmy said that heart rate monitors work a lot lower down than might be expected, so next run, I'm going to try moving the strap further down and see what difference that makes

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