 Superb. Let's just walk. Walk, just stand up and walk, stand up and walk. Good afternoon, welcome to Film My Run. I'm gonna steal a video today from my friend Tim, who did a video recently where he compared running with a heart rate strap to running with wrist based heart rate and tried to get better heart rate from his wrist by what he did was move the watch instead of having the watch here on the wrist, he moved the watch up to here. What I'm gonna do and what I often prefer to do when I'm not wearing a heart rate strap is actually to move my watch to my other wrist and put it on the underside of my wrist. That's my preferred option for getting better wrist based heart rate. I am also wearing my chest strap. I've got three watches. So I've got the Phoenix 7 on this wrist. That is doing wrist based heart rate from my left wrist as normal. Then I've got the Epics 2 on this wrist and the Epics 2 is on the underside of my right wrist. So I'm hoping to get better heart rate from that and then we've got the Phoenix 6 watch which I'm gonna put in my pocket and that's connected to the heart rate strap on my chest, which is the Garmin HRM Pro. So given all that, we're now gonna run about 7K. We're gonna do one kilometre of warm up and then five kilometres at pace and then one kilometre of cool down and we'll see what we get at the end. And we're also gonna try and make Victoria go quite fast. She's not gonna enjoy it. Okay, we're off and running and we'll see what we get. Well, Victoria used a cool phrase. This feels punchy for a warm up. Punchy. Well, this is punchy, isn't it? All right, 1K warm up done just about. So we're about to speed up a bit and let's see what happens. Right, one kilometre done. Heart rate on the left wrist. So this is your standard watch position, 149. Heart rate on the inside of my right wrist, 152. So actually about the same. In fact, yeah, 153 on here. So pretty much the same. And heart rate from my strap. Also 153. So it looks like they're matching quite well at the moment, all three of them. Okay, just past the second kilometre and left wrist, right wrist and chest strap. All 154. Victoria's doing okay, she's keeping up. Okay, just ticked over three kilometres. Well, four kilometres, but three kilometres in our 5K time trial. 158 on my left wrist. 158, 158 on my right wrist. Come on, Vic. 161, 162 on the chest strap. Hope and Vic can keep up. We are pushing it a bit. Right, just check the watches again. So we've got one kilometre to go of our bit of speedy 5K and all three watches. 156, heart rate. Although now I'm talking. 160, 160. So as I talk, my heart rate goes up, but what's important is they all seem to be matching or very close to each other. Come on, Victoria. There's the park run, 4K sign. Did you watch to go there? Superb. Let's just walk. Walk, just stand up and walk. Stand up and walk. Come on, stand up and walk. Right, I am hoping that Vic has accidentally run a 5K PB there. Yeah, right. Back up to a slow jog for the last kilometre home. Cool down, yeah. Right, back to heart rate. Left wrist, standard position, 127 BPM. Right wrist underneath 130. You might be going up because I'm talking. And chest strap, 133. 131, 134, 137. So then they're ballpark, but they're not exact, are they? They're not the same. Right, there we are, 5K PB hopefully, or unofficial 5K PB for Victoria. We've done seven kilometres altogether and let's go back into the shed quarters and have a look at the computer and see what the differences are between these three watches. All pretty modern. Phoenix 7, Phoenix 6 and Epics 2. So all pretty good watches should have some fairly interesting results. Well, according to Garmin, it says that I'm maintaining. You're maintaining, so you haven't improved. That was a hard effort though. So there we are. We successfully secretly got Victoria to an unofficial 5K PB. 2239 was her time, according to Strava. But that was only part of the reason that we went out today. The other reason was to have a little look at heart rate from the wrist and from chest strap. So my friend Tim Gross, you can go and have a look at his video. I'll link it in the description. Tim Gross did a video the other day where he tried to get better wrist based heart rate by moving his watch from the base of his wrist here further up the arm to see if that improved the optical heart rate reading. Now what I've always done, as you saw, is I put it on the right wrist underneath my right wrist to see if I can get better optical heart rate. So let's have a look at what we got when I loaded all three watches into the DC Analyzer tool. So you can immediately see that actually the overall reading is pretty good from all three. They all match fairly well most of the way through. Let's just have a little look at the beginning. So the blue line is the Phoenix 7, which was on my left wrist in the normal position that you would expect your watch to be. The epics is the brownish line, orangey brown line. That was on the underside of my right wrist and the heart rate strap is being read by the Phoenix 6 watch, which was not on my wrist, it was just in my pocket. Let's just zoom in at the very beginning here. So this section here. And honestly, there is not much difference, is there really? All three watches rise as I start running and continue pretty much the same all the way through. There's, you know, marginal differences, but nothing huge. What I did notice was my heart rate dips. Now I have these regular heart rate dips. Let's just have a look at this section here. So you'll see there is a bit of a dip here from the Phoenix 7 on my left. This is the normal position watch. It does drop off a little bit there. So the other watches, the other strap is reading one, two, five heart rate, whereas the Phoenix 7 is reading one, 16. So that's a little bit of a dip there. But what you'll notice here is I, when I'm running on Zwift and I'm using a chest strap, I very regularly get these dips in my heart rate. And you'll see the chest strap has again recorded this very odd dip in my heart rate, whereas the wrist based watches, the Phoenix 7 and the Epics have not recorded that dip. Whereas here, you'll see both the chest strap and the Epics watches have recorded a dip, just not quite so great. And you'll also notice the other interesting thing about optical heart rate is that it does lag a bit because you've literally, you've got a distance from your heart to your arm. That distance equates to a lag in the time it takes for it to register what's happening with your heart. So the chest strap has recorded this dip here and then the Epics has also recorded a slight dip here. Interestingly, the Phoenix 7 records the dip around a similar time and then they all kind of come back up at the same time. But if you look at the whole run, in essence, from when, so here we started our fast 5K all the way through here, all the way through here, little, little strangeness there with the Epics, all the way through here to the end of the 5K time trial, it's all pretty much the same, isn't it? Hardly any difference, really. It's there or thereabouts. This is where we walked for a bit at the end when Victoria was completely shattered and then we got back up to jogging again and again we've got another little heart rate dip here, where the chest strap goes down but the other two, the optical watches just stay where they are. But really, you have to say that in my test, both on the left-hand wrist and the test on the underside of the right wrist and the chest strap, all of them are, you're not going to argue, are you? You're not going to argue with the result there. There's no one watch or one position where it's clearly better or clearly worse. You would argue that the chest strap is slightly quicker at responding. There's definitely no lag there and it is picking up rather more regularly these dips. I mean, I'm assuming those dips are actually happening and it's not a fault anywhere. But overall, I would say that in my test, optical wrist-based heart rate has performed pretty much as well as the chest strap and this is just one isolated case. So, you know, you'll have plenty of other examples and I do have other examples where optical heart rate has been a disaster and it's not worked at all. But in this particular case, on this particular day, on this particular run, all three watches, all three heart rate readings are within a nats breath of each other. So, that is it. That's the end of the video for today. Thank you very much for watching. Hope you enjoyed seeing Victoria get her unofficial 5K PB and hope you found the heart rate analysis interesting. Take care until next time. If you do, please hit that subscribe button on the Film My Run YouTube channel and we'll see you for another Film My Run very soon. Take care, bye-bye.