Why is my Apple Watch not detecting my falls?

I see a few posts about fall detection not working, and I just wanted to put some insight about what I’ve noticed…I have an Apple Watch 9, and have fallen 4-5 times with no alert or recognition from the watch, yet had 3 false alerts. So my conclusion is this: the fall detection is only for people who suffer cardiovascular changes that lead to a fall and or flail a lot while falling. I do not have a change in pulse or BP when I suddenly drop, nor do I flail or have any other dramatic body movements. I simply lose sensation and control in my left leg and drop to the ground. Sometimes I get a little inkling and can land on my butt, most times I go forward and catch myself with my arms/hands to avoid head trauma (luckily, so far). My falls occur because I experience neuropathy in my leg and issues in my hip so I hurt constantly and sometimes my whole left leg just goes weak/numb/dead like a log mid-step and then it’s like a jelly leg and I go down. So if I were to hit my head I’m screwed.


The times I have had false alarms were things like when I used a french fry cutter (a box with a blade atop you push the potato down through) and the potato shifted to be crooked so I pounded down with my watch hand to force it through…lots of swinging my arm HARD a range of 6-12” and striking the pusher like a hammer against the countertop…yet nothing when I tap something/shake something or just swing my arm, had to be forceful pounding. I think another time was when I was playing tug of war with a french bulldog that is very strong and does lots of yanking.


I know it’s limited to wrist movements and can’t be too sensitive, but I feel like abrupt elevation changes should be readable and at least trigger the watch to ask. It shouldn’t be reading activity at a normal height as possible falls yet ignore my arm suddenly changing from chest height to on the floor or ground. Apple developers need to work on it detecting a sudden 24-36”+ change in wrist height as a trigger for fall detection and I can’t believe in 9 iterations this has not been accomplished. I’d rather it mistakenly be triggered if I suddenly bend to pick something up off the ground (which I can’t really do but still) than to never react when I’m down on my face or butt feeling a little disoriented and can’t get up for 3-5 minutes.



[Re-Titled by Moderator]

Apple Watch Series 9

Posted on Oct 13, 2024 5:01 PM

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Question marked as Top-ranking reply

Posted on Oct 18, 2024 10:09 AM

Apple Watch uses several sensor and an algorithm to make an educated guess that the wearer has fallen. The accelerometer and gyroscope are used and each is just to measure separate but related functions. Accelerometer measures the velocity or speed at which you fall. In other words, if you fall too slowly, the fall will not reach the velocity the algorithm needs to alert the wearer of a possible fall.


The gyroscope measures the orientation of the watch on the wrist and if the angle doesn’t change on multiple attitudes, the algorithm with not detect the fall.


Apple faces the challenges of determining the difference between a wild arm swing (say a golf swing) and an actual fall. Depending on multiple individual factors and conditions surround the fall, the watch will not detect some falls, as you have observed. No device will be 100% capable of detecting every serious fall unless the wearer is also willing to accept multiple false positive.


Please make sure all your personal health information is up to date including weight (mass) and height. These factors will figure into the algorithm used to determine falls.


Manage Fall Detection on Apple Watch - Apple Support


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4 replies
Question marked as Top-ranking reply

Oct 18, 2024 10:09 AM in response to kittie8485

Apple Watch uses several sensor and an algorithm to make an educated guess that the wearer has fallen. The accelerometer and gyroscope are used and each is just to measure separate but related functions. Accelerometer measures the velocity or speed at which you fall. In other words, if you fall too slowly, the fall will not reach the velocity the algorithm needs to alert the wearer of a possible fall.


The gyroscope measures the orientation of the watch on the wrist and if the angle doesn’t change on multiple attitudes, the algorithm with not detect the fall.


Apple faces the challenges of determining the difference between a wild arm swing (say a golf swing) and an actual fall. Depending on multiple individual factors and conditions surround the fall, the watch will not detect some falls, as you have observed. No device will be 100% capable of detecting every serious fall unless the wearer is also willing to accept multiple false positive.


Please make sure all your personal health information is up to date including weight (mass) and height. These factors will figure into the algorithm used to determine falls.


Manage Fall Detection on Apple Watch - Apple Support


Oct 13, 2024 5:06 PM in response to kittie8485

It's my experience that the  Watch will learn when you respond to a fall alert. My watch typically asks if I fell, if I fell and am ok or give me the option to tap on I did not fall. In the early days of the Fall Alert on my watch I also received alerts when I did something with my left hand that resulted in a sharp blow. Banging on ice frozen to my sidewalk in winter with a shovel was on example. These false alarms decreased over time and I rarely see them.

Oct 13, 2024 5:19 PM in response to Ralph9430

Yeah false alerts aren’t my concern, I was just expressing the contrast of when it bothered to ask me if I fell versus all the times I have fallen and no response was triggered. I think the detection that exists for non-cardiovascular events is not sensitive enough, but if it detects a sudden height drop of say, greater than 50cm, it could be much more sensitive without being triggered by most normal activity.

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Why is my Apple Watch not detecting my falls?

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