The makers of wearable technologies encourage us to wear their gadgets to record how many steps we take each day, to track our calories in and out, and even to monitor our sleep patterns.
But one Reddit user called sasipikai has come up with a novel and altogether more romantic use of Sports Tracker Heart Rate Monitor 2: He used it to record what happened to his heart rate over a 40-minute period, during which he popped the big question to his girlfriend.
Anyone out there who's ever asked their loved one to marry them will know that the knee-drop is one of the most nerve-wracking experiences there is. But just how significant an effect those four little words can have on the ring-bearer is still fascinating to watch.
In data he shared with his Reddit followers, sesipikai demonstrates what was happening inside his body right before, during and immediately after his proposal. As the couple wandered around a park hand in hand, sesipakai's heart rate averaged at around 80 beats per minute, with one small but notable spike as he enjoyed an ice cream.
But as he began to scour the park for the perfect spot and recited the words in his head, his heart rate began to climb. And as he finally uttered the words "Will you marry me?" his heart rate soared to around 130 beats per minute - almost twice that of the lower end of the typical 'normal' scale.
Thankfully, as his girlfriend said "yes", his heart rate quickly returned to normal.
Good Magazine have created this beautiful, 90-second visualisation of sesipikai's heart rate data during the 40-minute experience, complete with a rather lovely soundtrack. Watch the results below.