Health app data is consuming over 5GB of my iPhone's space

For some reason the heart data in my health App is just getting massive. It's now taking up +5GB on my iPhone16. Of course I have read all the advice to go into the Health app, navigate to the Heart Rate area, scroll to the bottom select show all Data and delete all.. but it just won't go away.. in fact it keeps growing. I've gone into my profile selected the Garmin App and then all data and deleted that as well.. but NOTHING. It just won't go away. Any out of the box ideas other than buy an Android phone would be great.

For example I have been in and deleted this data on at least 10 occasions.. every time I go back in it reappears. I've deleted days individually and manually and then they come back. I've deleted all data.. and it is still there. And yes I have a very low resting heart rate!

Thanks

JM

[Re-Titled by Moderator]

Original Title: Health Data now over 5GB