RefSix

Run Tracker whilst refereeing

#41
I purchased a "Garmin Vivoactive 3 music" for this season and I'm really enjoying it already. I only use the standard running activity and track time, HR, distance and top speed. I use the GPS to review my movement after the game, but also use it to help motivate me to work harder during the game, by tracking HR and distance. I aim to run at least 4km per half (varying depending on the pace of the game) and if I'm not on track for that, then I use that to spur me on to move more.

My map from Saturday clearly shows I'm not getting wide enough, staying way too central. So I can also use this to help develop my movement and positioning, which is something I struggle with (being an ex CM). So next week I will be purposely thinking about getting wider during those passages of play.

Ref.jpg
 

Big Cat

RefChat Addict
#42
I purchased a "Garmin Vivoactive 3 music" for this season and I'm really enjoying it already. I only use the standard running activity and track time, HR, distance and top speed. I use the GPS to review my movement after the game, but also use it to help motivate me to work harder during the game, by tracking HR and distance. I aim to run at least 4km per half (varying depending on the pace of the game) and if I'm not on track for that, then I use that to spur me on to move more.

My map from Saturday clearly shows I'm not getting wide enough, staying way too central. So I can also use this to help develop my movement and positioning, which is something I struggle with (being an ex CM). So next week I will be purposely thinking about getting wider during those passages of play.

View attachment 3660
There should be some trend showing a diagonal . Your heat map doesn't show this at all
As @Russell Jones advised me, make an effort to get wide for long goal kicks and kicks from the GK's hands, so you get the side-on view of 'in the back ref!' (we're talking touchline wide if necessary)
Aiming to get wide is all about getting the side-on view of tackles as it's much harder to get calls right from behind the play. Keeping the play between you and the AR is less important at grass roots, because they're likely to be a Club Assistant
 

Mintyref

RefChat Addict
#43
I purchased a "Garmin Vivoactive 3 music" for this season and I'm really enjoying it already. I only use the standard running activity and track time, HR, distance and top speed. I use the GPS to review my movement after the game, but also use it to help motivate me to work harder during the game, by tracking HR and distance. I aim to run at least 4km per half (varying depending on the pace of the game) and if I'm not on track for that, then I use that to spur me on to move more.

My map from Saturday clearly shows I'm not getting wide enough, staying way too central. So I can also use this to help develop my movement and positioning, which is something I struggle with (being an ex CM). So next week I will be purposely thinking about getting wider during those passages of play.

View attachment 3660
Centre circle ref..........
 

Mintyref

RefChat Addict
#45
helpful insight there....
Ok TS, are you working with NARs or CARs ( and are those CARs allowed to give offsides?
If the former, you may on occasion need to go deeper rather than wider and running the diagonal or 'lazy s'.

If the latter, then you need to be as wide as is practical to give those offsides all on your own.

Better now?
 

zarathustra

RefChat Addict
#47
Ok TS, are you working with NARs or CARs ( and are those CARs allowed to give offsides?
If the former, you may on occasion need to go deeper rather than wider and running the diagonal or 'lazy s'.

If the latter, then you need to be as wide as is practical to give those offsides all on your own.

Better now?
Unless the convention where they are is that CARs give offsides.
 
#48
I purchased a "Garmin Vivoactive 3 music" for this season and I'm really enjoying it already. I only use the standard running activity and track time, HR, distance and top speed. I use the GPS to review my movement after the game, but also use it to help motivate me to work harder during the game, by tracking HR and distance. I aim to run at least 4km per half (varying depending on the pace of the game) and if I'm not on track for that, then I use that to spur me on to move more.

My map from Saturday clearly shows I'm not getting wide enough, staying way too central. So I can also use this to help develop my movement and positioning, which is something I struggle with (being an ex CM). So next week I will be purposely thinking about getting wider during those passages of play.

View attachment 3660
I used the Garmin (Forerunner) heat map a lot a few years ago and I test it by running quick shuttles at angles along lines. My conclusion was that it wasn't able to consistently accurately track - they are designed for straight line running at one pace, not backwards, sideways, start stop sprint - and my heat maps always looking like this - far more middly than in reality.
 

RustyRef

Administrator
Staff member
#49
GPS systems have sampling rates, often these are every 5 seconds. If you are running in a straight line or round a track then this works as it essentially predicts what happened over that 5 second period, and that doesn't really work for football where you aren't running in a straight line. When I switched from a Garmin to a Polar V800 that had the option for a 1 second polling interval, I turned that on and it made a massive difference to the distance I covered when refereeing. It came down significantly, and I could only assume that, given it was the same level game, that the 1 second polling was vastly more accurate when it comes to an activity that isn't running in a straight line.
 

Hoosier Ref

Well-Known Member
#50
I wear a Garmin Fenix 5. Love having it. I used to have a forerunner 410? that didn't do the mapping. I agree that the mapping is helpful and interesting. I love seeing the break down on heart rate, distance, spring speed, etc. I strongly recommend the RefereeWatch app if the vivo supports it. It turns my Fenix into a Spintso tracking stoppage etc. It does the vibration when paused, time expires, etc just like the Spintso.
 

Big Cat

RefChat Addict
#51
GPS systems have sampling rates, often these are every 5 seconds. If you are running in a straight line or round a track then this works as it essentially predicts what happened over that 5 second period, and that doesn't really work for football where you aren't running in a straight line. When I switched from a Garmin to a Polar V800 that had the option for a 1 second polling interval, I turned that on and it made a massive difference to the distance I covered when refereeing. It came down significantly, and I could only assume that, given it was the same level game, that the 1 second polling was vastly more accurate when it comes to an activity that isn't running in a straight line.
Yes, I worked with a referee at the weekend who wasn't particularly mobile! He claimed to have covered 5.6 miles in the game. Maybe that included his journey to and from the game, but I need to get me one of those watches
I wear a Garmin Fenix 5. Love having it. I used to have a forerunner 410? that didn't do the mapping. I agree that the mapping is helpful and interesting. I love seeing the break down on heart rate, distance, spring speed, etc. I strongly recommend the RefereeWatch app if the vivo supports it. It turns my Fenix into a Spintso tracking stoppage etc. It does the vibration when paused, time expires, etc just like the Spintso.
I have a Garmin Fenix 5S. It over calculates measured distances by just over 1% (measured running performance 1% worse)
I'm inclined to think it's less accurate when refereeing. Personally, although it looks smart, the watch has been a gimmick and not worth the money
 

zarathustra

RefChat Addict
#52
Where you are and what is around you, and even time of day etc can have an impact.

The more satellites your watch can hit the more accurate you track will be, so things like over hanging trees or tall buildings nearby can have an impact, as well as how many satellites are in the right place at the right time.

I lived in central London for a few years, and the GPS from watch would always be out, with the track sometimes going over buildings rather than to the end of the road and around the corner, as it lost the connection to the satellite for a short period.
 

RustyRef

Administrator
Staff member
#53
I lived in central London for a few years, and the GPS from watch would always be out, with the track sometimes going over buildings rather than to the end of the road and around the corner, as it lost the connection to the satellite for a short period.
That's a good point, quite often when I go for a run down the Thames path at lunchtime it looks like I've been for a swim. Not that surprising with the ever increasing number of skyscrapers.
 

JH

RefChat Addict
#55
Polar M430 has been brilliant for me, very accurate when running/walking down paths, 1 second sampling rate which I'm inclined to think gives me pretty accurate distance data. I cover 6.5-7.5 km per middle on average which I think is a fair representation.
 

JamesL

RefChat Addict
#56
I "upgraded" polar v800 to polar Vantage V. This saw a significant reduction in distance covered and max speed. I am inclined to believe the v800 was over estimating my distance covered and max speed even on the 1s sampling rate given the newer tech in the Vantage V.
That said I am still covering 8k+ per game and max sprint speed will be in decline at my age now anyway.
 

Big Cat

RefChat Addict
#57
I "upgraded" polar v800 to polar Vantage V. This saw a significant reduction in distance covered and max speed. I am inclined to believe the v800 was over estimating my distance covered and max speed even on the 1s sampling rate given the newer tech in the Vantage V.
That said I am still covering 8k+ per game and max sprint speed will be in decline at my age now anyway.
Interesting topic, distance measuring... I like measuring things, apparently as a kid i used put the ruler on the tele to see if the snooker ball was heading for the pocket. Dad didn't have the heart to tell me that the cathode-ray screen was concave!
My reffing distance has crept up from ~7k when i started out to 8.5k in challenging games now. I blame @Russell Jones who advised me to get wide on occasions, which has left me blowing out my back door :drool:
 

Mintyref

RefChat Addict
#58
Interesting topic, distance measuring... I like measuring things, apparently as a kid i used put the ruler on the tele to see if the snooker ball was heading for the pocket. Dad didn't have the heart to tell me that the cathode-ray screen was concave!
My reffing distance has crept up from ~7k when i started out to 8.5k in challenging games now. I blame @Russell Jones who advised me to get wide on occasions, which has left me blowing out my back door :drool:
The instruction was 'on occasion'.........once per half should be enough.........
 
#59
Interesting topic, distance measuring... I like measuring things, apparently as a kid i used put the ruler on the tele to see if the snooker ball was heading for the pocket. Dad didn't have the heart to tell me that the cathode-ray screen was concave!
My reffing distance has crept up from ~7k when i started out to 8.5k in challenging games now. I blame @Russell Jones who advised me to get wide on occasions, which has left me blowing out my back door :drool:
Mwahaha ... my work here is done :devil:
 
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