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Garmin 645 Review | Alton Sports Ambassador – Dave Warman

What’s in a Mile?

When I started going outside I had nothing “Proper Runny” what I mean is I was wearing my 10 year old Nike Air Max trainers, my New York Rangers hat and my chino “holiday” shorts & I was happy with that, this was my “running kit.”

Fast forward to October 2013 & I had my first pair of Asics GT Trainers a Garmin Forerunner 110, heart rate monitor and a Nike Dry-fit running shirt, after 1812 recorded miles and 287 recorded activities I got very ambitious.

Fast forward to 2016 &  I had upgraded to a Garmin Forerunner 620 running watch, iPod shuffle, Garmin Heart Rate Monitor, Skins compression Leggings, Adidas Tech compression T-shirt & of course Brooks Ghost trainers. I was also step tracking so I was wearing the Garmin Vivosmart HR

After 2333 miles & 601 recorded events walking and running I have just upgraded again to the Garmin 645, IT’S AWESOME!!

Gone is the chest strap heart rate monitor, the Vivosmart HR has been retired, I have one device that does everything, how cool is that?

Now Before I had the Forerunner 110 I assumed the route I was running was at least a 10K and doing the double and a bit more would get me into the London Marathon with the number 1 ranking, it was only after I started tracking my data did I find out my “long route” was only 2.3 miles.

Still it gave me something to aim for.

The amount of information available is incredible!

You will note with the Forerunner 110 I have a map of where I have been and data on elevation, Pace and Heart Rate, to get the data off the watch I need to plug it into its cradle and upload the data to my laptop and the Garmin Connect app will upload it to my account, its clunky but it’s not hard and it does tell me the basic information.

The Battery life was reasonably good, however the GPS signal did take a while to work, the data available is fairly simple, as well as the map of your route, you get elevation, pace and heart rate, this is as long as you have the heart rate monitor on. You will also get a breakdown of how long it took you to do each mile, this data is very helpful and shows you where you were strongest on the event you have done and what you need to work on for the next race, the elevation graph also proves you did run up that hill !!

The Garmin 620 is a massive upgrade from the 110, it was twice the price! The watch is not only touchscreen but has wifi & Bluetooth, this means it will automatically upload your data to your running account (Garmin Connect) without having to plug it into the computer to view your data.

The 620 also gives you other information, this includes “Run Cadence” this in a nutshell is your “Steps per Minute”

This model also comes with some other stats called “Running Dynamics” this includes your average stride length, it appears mine is 0.92 metres.

I found this watch to be a lot quicker to find a GPS signal and a lot more user friendly. I have used it abroad several times and it worked very well, I am sure it has many more functions that could be very useful, however I didn’t use or find them. This watch is not a “smart watch” when I say that what I mean is it doesn’t do step tracking or connect to my phone to get my Facebook updates. You might say it’s a purist running watch, however as I did start tracking my steps and wanting my messages on my wrist instead of having to get my phone out of my pocket!! I still had to continue wearing a chest strap heart rate monitor, I seem to have a knack of breaking them as I have gone through 3 so I was getting a bit fed up using it, the 620 served me well over the two years I wore and inspired me on four marathons & made me feel like a “Proper” runner as I was no longer using a basic watch, again the battery life was really good but I did get a scare on my last marathon as the battery warning came on just after I crossed the finish line on my last marathon, just think what sort of a mess I would have been in if I had done some more character stops on the Disney Marathon!!


Technology has really moved on and with the launch of the “Fruit-Based” watch everybody else has started playing catch-up, Garmin is no slouch and the 645 is the watch I was waiting for, believe me I thought really hard about going over to a Apple 3, I have an iPhone, an iPod & I like Granny Smiths so the signs kept pointing me towards green fruit.

I really had to think hard about starting again with the running data and looking at previous data and thinking “How did I do that?”

The Garmin 645 was the answer to my prayers, I wanted a smart watch and a serious running watch, I got a bit fed up of wearing two devices and I wanted something that looked ok to wear for work as well as play, the 645 fits both of those requirements.

Business at the front, Party at the back

The 645 has many many other features and things that I still haven’t found, it even tells the time, going through the functions I have found you can also do other things apart from Running, including walking, cardio, treadmill running, swimming (I tried it its true) & biking, The watch has its own Barometer, what this means is what I think is a hill actually it isn’t!!

The GPS is a lot quicker and appears to be a bit more accurate, I also found a real time map on it doing my last run.

In conclusion this is the best watch I have ever owned, in this I am including the Casio F-85 I got for my tenth birthday & the Knight Rider watch (ask your dad kids!) I had in 1985 that played the theme tune, it’s just that good.

Just for a laugh below is my data over four years of running the Fleet Half Marathon, you will note I have had limited success, however I don’t intend to give up as it’s a great race.

As I approach middle age and my mid –forties I have come to appreciate “If it doesn’t challenge you it doesn’t change you”

Written by Dave Warman 


Check out the Garmin 645 right here on the Alton Sports site!

Garmin 645 Music + GPS Running Watch | Rose Gold

Garmin 645 Music + GPS Running Watch | Rose Gold

GPS running watch with music and Garmin Pay ready

  • Easily download up to 500 songs to your watch, and connect with Bluetooth® headphones (sold separately) for phone-free listening
  • Syncs music from Deezer (coming soon) for offline listening7
  • Includes the Garmin Pay Ready contactless payment method1lets you make convenient payments with your watch, so you can leave your cash and cards at home
  • Provides advanced running dynamics2 including ground contact time balance, stride length, vertical ratio and more
  • Uses wrist-based heart rate3 to offer performance monitoring features, including evaluating your current training status
  • Battery life5: up to 7 days in smartwatch mode; 5 hours in GPS mode

Running is more than just exercise, it’s a performance. And Forerunner 645 Music has the tools to help you put on the perfect show every time you lace up your shoes. It features on-device music storage, so you can run with your favourite tunes. And contactless payments let you buy what you need without missing a beat. With all that plus advanced running dynamics and performance monitoring tools, this GPS running watch is the instrument you need perfect the act.


With up to 500 songs worth of music storage built right into your watch, we’re putting the “beat” in your daily mission to beat yesterday. It’s easy to transfer music from your computer and then queue up your favourite playlist for easy listening through Bluetooth headphones. Now you really can leave your phone behind when you head out for a run, because the music that helps keep you moving is right there on your wrist. If you’re a Deezer premium+ subscriber you can even sync your carefully-crafted playlists to your watch for more ad-free listening (coming soon).


Paying made easy

Always on the run? Feel free to leave your phone and wallet behind. Forerunner 645 Music features the Garmin Pay Ready contactless payment method1, which lets you pay for purchases with your watch. Use it just about anywhere you can tap your card to pay. A bottle of water here, a bite to eat there — just pay, and keep on moving.

garmin pay

Tune up your training

We’re making it easier to get the data you need to improve your form. Let Forerunner 645 Music measure crucial running metrics2 that you can use to analyse your performance. Biomechanical measurements, such as cadence, stride length, ground contact time and balance, vertical oscillation and vertical ratio are the key to understanding your form so you can bring your best on race day. These metrics are available with the addition of a compatible heart rate strap or the compact Running Dynamics Pod, which clips right onto your waistband. Also, take advantage of feature sets to help with cycling and even swim training. In the pool, Forerunner 645 Music will track your distance, pace, stroke count and more.


Monitor your performance

Just how effective is your current training plan? Forerunner 645 Music will help you monitor your training and recovery so you can better prepare for a race or training cycle. Training status is a new performance monitoring tool that automatically evaluates your recent exercise history and performance indicators to let you know if you’re training productively, peaking or overreaching. The new anaerobic training effect metric opens a window of insight to a critical dimension of training, telling you how your training is improving your ability to push the limits. You can even view your overall training load, which measures your exercise volume from the last 7 days and compares it to the optimal range for your fitness and recent training history.

Monitor Performance

Ways to Customise

More ways to customise

Check out our Connect IQ™ store, where you can add personality to Forerunner 645 Music by downloading apps, widgets, watch faces and more. It’s easy and even better, it’s free. New apps are added every day, so you can keep tabs on when your Uber is arriving, turn on your lights at home with the SmartThings app, and even use the AccuWeather MinuteCast app to find out when the rain will start. With the Face It watch face app, choose any image from your photo library, make some tweaks, and set it as your watch’s face.

Stay connected on the run

Forerunner 645 Music makes it easy to run without leaving important smart features behind. Once paired with your compatible smartphone you’ll be able to receive and respond6 to text messages and see social media updates, emails and more right on your wrist. You can even use it to find your phone. Or access music controls. And let friends LiveTrack your runs.


Share and compete

Syncing your activities to Garmin Connect is for more than just storing your data. Garmin Connect is a thriving online community where people on the go can connect and compete by joining challenges, encourage each other’s successes and even share their triumphs via social media. Garmin Connect is free and available on the web or on your smartphone with the Garmin Connect™ Mobile app.

Train your way

Your routine is anything but routine. Forerunner 645 Music lets you change things up with ease, thanks to built-in activity profiles for running (indoor/outdoor), cycling (indoor/outdoor), swimming (pool), elliptical, paddle sports, strength training and many more. Create your own custom workouts, and download for free from our Garmin Connect online fitness community. Then review your past efforts on the app, or share them with family and friends for added motivation.


Love the Look

Feel free to take this watch outside in all kinds of weather. Not only is it safe for swimming and showering, its Garmin Chroma Display is easy to read — even in direct sunlight — and housed under extra-durable Corning® Gorilla® Glass. When you want to change it up, swapping bands is fast and doesn’t require tools. The perfect everyday companion, this lightweight watch is rated to 5 ATM (50 meters) to be safe for swimming and showering. And with up to 7 days of battery life in smartwatch mode and 5 hours in GPS mode, with music playback, Forerunner 645 Music is the running partner that can keep up with you.



Your order will be dispatched by our dedicated team at Alton Sports. We have a very diverse team with many of our staff members being involved in various running disciplines including 800m to 10km on the Track or Road, Half Marathon to Triathlon and everything in between. Some of our colleagues compete to a high level in both domestic and international competition. Our skills are wide ranging from having qualifications in anatomy and physiology to nutrition to postural assessment and even exercise and coaching.

Should you have any questions or if you would like to know more about Alton Sports or the services and products we offer, please call us on 01420 562267.