Bryton makes a range of wrist worn and handlebar mounted systems for running, cycling and multisport fitness. Its Cardio range comprises two products – the Cardio 40 and Cardio 60, the latter of which is a multisport watch perfect for triathletes. I’m looking at the Cardio 40, designed specifically for runners here.
This is a really beautifully designed sports watch. It is thin to the point where it is difficult to believe there’s a GPS unit tucked inside it. Yet it has a big face that’s capable of displaying plenty of information in large, bold figures that are easy to see at a glance when you are on the move.
The shiny plastic fascia and green highlights tip a nod to good design that’s welcome. They’re appealing to look at and mean you probably wouldn’t feel like too much of a nerd if you wore the Cardio 40 as your everyday watch. A couple of words of warning though. This is a large beast. I’ve got smallish wrists and I like to wear a big chunky watch, but even I found it a little bit big to wear.
It’s worth being aware of battery life too. Bryton says the battery will give you 14 days in ‘clock mode’ and 8 hours in training mode. That’s good going for a GPS watch, but means if you do wear it as an everyday watch you’ll be advised to set a regular weekly battery top up schedule. Given that you’ll be using it regularly for running that’s probably not a big deal – it’s the regime I used during the testing period and it wasn’t a bother. But it is worth noting that like other sports watches of a similar grade it uses a proprietary charging clip that you’ll have to have on hand when the juice runs low.
As well as offering a wide range of on-board features and coming with a heart rate monitor the Cardio 40 synchronises with a web based service that can help you analyse performance, so you get just about everything you need out of the box – there are no extras you need to get hold of to get full value.
Setting up the Bryton Cardio 40 is an easy job. The first few steps have you selecting a language and putting in your sex, age, weight and height as well as selecting a maximum heart rate.
The Heart rate monitor clips easily onto a fully elasticated chest strap that I found comfortable to wear. Pairing it with the watch for the first time is a bit tedious as you have to enter an ID code – found on the HRM packaging. But it is a once only job and it does mean the watch can’t get confused by any rogue equipment.
You don’t get quite as much viewing area on the Cardio 40 as you might at first think. As I noted earlier on the screen is quite large, but the viewing area has a narrow bezel all around. Still, at 1.4-inches across there’s enough room for up to four fields of information to be shown. You can customise what you see selecting from a huge array of options. The standard fare is all here including time, speed, distance, pace and calories burned. You can also tap into the heart rate monitor and display actual, max or average heart rate and a couple of other heart related stats.
In addition you can display your stride rate, average and maximum strides. I rather like this option. Many runners can overstride, shortening the stride can help them move faster and more efficiently. If you are on the road to a shortened stride then keeping an eye on stride length could be really useful.
The full list of metrics you can display is too long to recount here, but I’d like to note that you can even show sunrise and sunset times, which I guess is handy if you are on a long trek or run and want to be back before dark. You can configure up to four of display screens, and even auto scroll between them so there’s a huge potential for personalising things.You can set up workouts. Under the ‘simple’ heading you can set the watch to let you know when you have gone a certain distance, spent a certain time on a workout, or burned a required amount of calories. There are also interval training workouts and custom workouts to play with.
Like any sports watch worth its salt the Cardio 40 will record your performance against specific intervals – km or mile based laps. But you can also set your own laps and you can do this either for a set distance or using a specific location a starting point.
This is all very flexible, but one thing that really irks me is the lack of vibrating alert for lap completion. The beeps the Cardio 40 gives off are high pitched, short and very quiet. They’re truly the weakest part of the whole setup. You’ll struggle to hear them in all but the quietest environments. A vibrating alert is really important for any sports watch and it is a shame it is missing here. I’d also say that the watch is ever so slightly slow to respond to button presses, something that annoyed when I was going through menus.
Another gripe is the side buttons. They’re large enough, but quite spongy and I found them a little tricky to use with sweaty fingers. I often grumble about this on watches, though, so maybe it’s just me. The front button, for OK and lap marking, is, by contrast, easy to use. Shining out like a green jewel in the surrounding black space you can see it readily, and it protrudes a bit too so it’s easy to find by touch.
If you want to make use of the online features you also need to download the Bryton Bridge application which connects to the Cardio 40 via the USB wired charge cable to upload activity data and download firmware updates. Using this you can upload to the web or to your computer for later uploading if you don’t have the internet. You might want to do this for backup purposes, but the Cardio 40 has plenty of internal capacity – its limits are 82 hours of activity and 1,500 laps of data.
Once your data is uploaded you can view workouts on a calendar that summarises what you’ve done when for a macro level view, or drill right in and take a look at today’s data giving you a dashboard view of calories burned, distance travelled, altitude gained, cadence and a range of heart rate statistics. This dashboard view actually means the Cardio 40 could double up to offer you all the stuff a Fitbit does, with the added accuracy on distances measurements that a GPS can – as long as you have a signal, of course.
What you are most likely to want to do, though, is analyse and track your activities, and this you can do to the nth degree. You can see summary charts of how much activity you’ve done over any timeframe and look at distance, heart rate, speed, intensity and all manner of other stats. There are loads of dynamic elements. For example the graph below your mapped route is linked to the map so that if you pass the cursor along it you can see where you were each statistic was recorded. Where did that peak in activity come? Where did I slow down so much? It can all be revealed.
As if that weren’t enough you can create workouts giving you even more control over how you train. The interface is suitable for all three triathlon sports as well as for walking and ‘other’ making it flexible if you change disciplines and as your levels of activity grow over time. To schedule workouts you just drag them from the list onto the calendar.
It’s actually difficult to think of an analysis metric that isn’t offered here, and if I have a criticism it is that for the newcomer things might be a bit tricky to get to grips with. Serious athletes, though – by which I mean anyone looking to work hard and develop even from a standing start – will find everything they could wish for here.
Conclusion
The Bryton Cardio 40 is a smashing piece of kit. The watch is superb, its main failing being the lack of a vibrating alert and a slightly sluggish response to button presses. The range of metrics gathered is vast, battery life good, on board storage likewise.
The online software offers so much functionality that I’ve not actually covered it all in the review. Suffice it to say that walkers and marathoners ought to find it has plenty to offer. Some watches are designed for people at particular levels – for experienced athletes, or ‘serious’ ones, others better for beginners. The Bryton Cardio 40 really could be all things to all runners. Start with it as a couch potato whose goal is to walk five miles quickly, and it will see you through your first marathon and beyond.
Pros:
- Comprehensive metrics
- Good battery life
- Good on board features
- Stylish design
- Great online features
Cons:
- Proprietary charge and sync connector
- No vibrating alert
- Very quiet audio alert
Score: 9/10
Manufacturer: Bryton
SRP: £150
Hello Sandra,
thank you for this review. Does the watch show the tempo (speed of running) in minutes per km or in km per hour? Or is it freely to adjust by user’s preferences?
Can be the the backlight whole training on?
Thank you for your reply.
Regards,
Miroslav Mrklovsky
Czech Republic
Hi Miroslav. The watch can be set to show either tempo or pace – and you can show both on the same screen if you like as you can show up to four metrics on each of the four data screens. The backlight stays on for about five seconds and then goes off.
The duration for which the backlight stays on can be customised (I think between 5 and 60 seconds): Settings >> General >> System >> Backlight
Hi Sandra, Thank you very much for your review.
I would like to buy this watch but am concerned about GPS inaccuracy and the autopause function being on all the time. Should I be concerned? Do these lead to major or minor inaccuracies?
How quick is GPS reception when switching on ?
Also, are there any problems with uploading to a mac?
Regards,
Andrew Davies, Dublin, Ireland
Hi Andrew
The GPS seemed fine to me. I have reviewed watches with bad GPS which gets fixed by later software updates – so if your question comes because of something you’ve seen in another review it is possible any early issues were resolved by firmware updates.
GPS reception is good and a signal is picked up quickly. I didn’t notice any real difference between this watch and others. Generally I pop my watch outdoors while I get changed into running gear and by the time I’m ready to run it has a signal. It will be slower to get a fix if you have not used the watch for a while, or if you go to a different location a long way from the previous one.
I can’t answer your Mac question I am afraid as I was not able to test that aspect. All in all, though, I’d say this would be a pretty good choice.
Thanks Sandra,
That clears up my doubts. I intend ordering one later today. Please keep up the good work! One last thing . Did you test the the stride sensor for accuracy in distance yet. Not a deal breaker for me though.
Hi Andrew, I have twice seen your question (once to DC Rainmaker) about the accuracy of the stride sensor, but it appears no-one has offered an answer. I, too am interested to know whether it is accurate before I purchase one. I would appreciate an info you get on this. Kind regards, Mark
I have been using my Cardio 40 for about two weeks and must say that I am absolutely satisfied with its performance.
I originally thought of using it as a second watch to my Rcx5, but now intend selling that unit.
This unit is slightly lighter and thinner with a green accent, although it only has 8hours gps battery life and 2 weeks in watch mode , as opposed to 16 hours and 4 weeks on the cardio 60.
It is designed for runners and therforefore has no other sports and metric sets available
Autopause may now be turned off.
Satelite search and lock is lightning quick.
Huge number of metrics are available and display customisable.
Complex workouts may be used.
Unit has a clear and crisp display and is comfortable on the wrist for long periods.
Its instant pace seems pretty stable , with sampling being every 4 seconds, as does cadence. I have not tested the indoor pace cabability yet.
Allthough not as slick, with slightly illogical menu systems, I feel that it is a serious competitor to the new Forerunner 620 ( and the old 610) at half the price.
Connecting a new heart rate monitor with the watch is a hell!!!
I have tried it the whole evening.
I have received a new heart rate monitor as the otger one was broken.
Now I need to pair a new one thing I see is
Status active
ID 0
How can I enter a new code????