Garmin 305
I just got a Garmin Forerunner 305 after reading all the posts here about it. Actually, I bought the Polar 625X on Friday, but didn't like the interface very much, and after reading all the great posts about this stuff in the past, I took it back and got the Garmin instead. :rolleyes:So far, having just taken it out for a walk, I like the 305 a lot.
For those of you that already own them:
What are all the cool things you can do with it that you learn from owning it, not from the manuals? What are the top 5 things you do with it on a regular basis?
Also, it seemed that the elevation and grade reading varied quite a bit. For example, if I stood still, the elevation would swing a good 10 feet or so. Is that normal? How does it read elevation? From the satelites or is there a way it can read it from air pressure or something?
Any tips/tricks or other thoughts would be appreciated! :D
I'm sure it reads elevation by satellite triangulation. Air pressure varies a great deal at any given elevation (that's all wind is really, areas of high pressure). I agree that the elevation and grade info seems worthless. It jumps around a lot and never seems to reflect the conditions I'm facing. I'm sure if you were going up/down very large hills or mountains it would register, but for relatively flat workouts the data is erratic.
I find the elevation type information much more useful as a reference after it's uploaded to a site like motionbased.
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I remember playing with the navigation features when I first got mine. The function appeared to be very hard to use, and practically worthless. Then one day I got lost on my bike ride. The navigation feature and I have had a great relationship since then. Without my Garmin, it would only be a matter of time before I was sitting next to my bike at a country intersection with smoked legs, empty water bottles, and a dry mouth, wondering how I ever let myself get in this situation.
I have a 305 and so far like it. How do you use the multisport feature. I want to be able to wear it while riding, and then just transition to the run. Do I need to do anything with the 305 to enable this? The manual isn't very helpful.
thanks
Not a primary use for my garmin 305, but I did go snowboarding out west with it and used the elevation to track the vertical feet that I rode for the day. During the day, I got off of several lifts where posted signs stated the "exact" elevation and the garmin calculated elevation number matched (with some fluctuation as cjhoffmn mentioned - up to 50').
Regarding the grade, I tried to calculate the grade for the tough hills that I ride as a comparison of one street against another (for comparing training effort), but like sully said it is too eratic at that "micro level" but overall it's decent. It was at about this moment that I realized a power meter would be an excellent tool.
"Only those who will risk going too far can possibly find out how far one can go."
-T. S. Eliot
For more experienced users: Is there any way to change the scales of the graphs that it creates when you load the Garmin Training Center? It's nice that it does everything automatically, but the scale on some measurements is wacky. Pace for example usually ranges from 0 min/mi up to 100 min/mi. Sometimes the bottom end is even -10 min/mi :confused:
I am of course concerned with things in the range of 5-15 min/mi but with such a large scale all the data is compress and you can't make a lot of sense of it. Thanks for any help!
Oh I hate their scales! I haven't found an obvious way to change them, but I don't use them for much either. I tend to just use the ones motionbased makes.
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So I've been using the Garmin for a few days, but mostly for indoor workouts. Realizing of course, the satllites won't work that way, I'm not too concerned, I'm just doing long base spins inside. On the first ride, I had been outside with it for a very short run, then come inside and spun using one of the workout modes - calorie burner.
The goal of that is just to work until you burn 500 calories in zone 1. So far, so good until I realize its taking forEVER to get to 500 calories. It was late, so I didn't really investigate, I just realized I'd have to figure it out later.
Tonight I did another spin for about an hour and twenty five minutes, but set the watch to "indoors." It simply didn't track calories. Frustrated, I did some searches and found this post with comments:
http://blog.gruby.com/2006/03/17/mini-review-of-garmin-forerunner-305/
It seems that several people suggest that it calculates calories based on motion and satellite coverage. Which then makes some sense of the other night's ride. I went and "viewed" that ride on the map, and sure enough, there was a ton of satellite drift - probably enough to account for the small amount of calories I was registering.
Does anyone know if this is true? Also, there are several comments about how out of whack the calories counted are, as a result of the same calculation when they run/ride.
I'd really love some feedback to learn if this is true, because if its really as in accurate as some of the comments suggest, I'll return it and get a polar instead.
-C
Yeah, I'm pretty sure calories are calculated based on speed for a given method of transportation (running of biking) and not on heart rate.
I've kind of ignored the calorie count - it always seemed like a wild guess... take a look at this old post from runnersworld...
http://forums.runnersworld.com/eve/forums/a/tpc/f/194106038/m/2751036101
somewhere in the middle of the thread is a comparison of garmin and sportstracks to a number of websites that report calorie burn for a given activity - garmin seemed to be the outlyer in the report.
"Only those who will risk going too far can possibly find out how far one can go."
-T. S. Eliot
oh, I do agree that the calorie count is based on speed because I forgot to stop my garmin before driving back from a meeting point after a ride and, after a short car ride on the highway at 60mph, I burined 10,000+ calories.. when combined with my other laps (cycling), it pushed my avg speed up to a place i can only dream of :)
"Only those who will risk going too far can possibly find out how far one can go."
-T. S. Eliot
i called GARMIN about this issue in January. They confirmed that calories was based on speed and not heart rate. That kind of sucks, but the 305 is so damn usefull in so many other areas that i can look past that issue.
so i was a little upset about this last night, and I'm not surprised to hear the calculation is made that way. After I thought about it a while, I realized I'm not sure I really care that much. At the end of the day, the calorie calculation is an estimate anyway, and really, I should care more about the zone my HR is in, rather than the calories.
After thinking through it, I agree, its so darn useful for so many other things, that I'm ok with a wacky calorie count.
Thanks for the responses.
Best tool ever for GPS running analysis.
Think of it as cycling peaks WKO+ for the run. You can track your GOVSS or TSS on the run and chart and plot and forecast out the amount of aerobic stress that you will be training under.
MarkyV Racing and Coaching
Powertap Dealer: Ask me how you can get rolling with power
My forerunner is making me want to work out more than ever so I can come back inside and see the data. :D After this summer I had virtually lost all the joy I used to find in running....now I have found it again!
Perhaps its also because I've been practicing some of the features of Evolution Running that I read on here. I don't have the book/DVD yet, but I will probably order it soon because I'm feeling great and loving every step.
One word: SportTracks
Grab it for free here: http://www.zonefivesoftware.com/SportTracks/
You'll crap yourself after you start using it with the 305.
Also, if you want to swim with it, I wrote up a blog post for how to do openwater swims with it.
-Ray
Tri Blog: Http://dcrainmaker.blogspot.com
Thanks for all the responses. I look forward to more time using the FR 305. I'll also check out sport tracks. I'm always looking for new ways to be regular...
Thanks all!
So in the interest of learning more about the 305 than the engineers at Garmin:
What gets priority in recording data on the 305, the accessories or the satellites?
When I receive my cadence/speed meter and install it on the bike, does it still read speed from the satellites or will it read it from the accessory? Same question for the footpod. If I bought the footpod and wore it running outside, would the device calc distance/pace/speed from the satellites or the footpod?
Anyone know?
I just ordered mine online yesterday, on Amazon ($217-$50 (rebate)) I really can't wait to receive it and play with it ^^
Does anyone know if there is a way to break up laps into different workouts? When I first got my garmin I did one lap as a training run and then the next lap in the same workout was a 10k race. That was my own fault because I didn't know how to start a new workout, but now all the logs are messed up because it tries to combine them into the same activity with a 1 day break in between.
For more experienced users: Is there any way to change the scales of the graphs that it creates when you load the Garmin Training Center? It's nice that it does everything automatically, but the scale on some measurements is wacky. Pace for example usually ranges from 0 min/mi up to 100 min/mi. Sometimes the bottom end is even -10 min/mi :confused:I am of course concerned with things in the range of 5-15 min/mi but with such a large scale all the data is compress and you can't make a lot of sense of it. Thanks for any help!
Oh I hate their scales! I haven't found an obvious way to change them, but I don't use them for much either. I tend to just use the ones motionbased makes.
Okay, I've logged into motionbased and uploaded my info there. But the graphs still display a huge peak in pace whenever I stop. I have the 305 set to autostop above 11min/mi yet it still takes a data point or two at 30+min/mile which makes the graphs almost useless. Is there anyway to fix that?

I've never seen that.... perhaps by using mph instead of pace on the left scale?
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I think there is a way - Not sure how practical it is...
In motionbased, you can export the file as a .gpx file - If you open this text file in a simple text editor like Notepad. It contains a series of data points (an example looks like:
7.32007-11-04T07:42:20-05:00101.438691062227785.277308837183722
This corresponds to the latitude/longitude, elevation, time, course and speed variables that your garmin captured while running -
Clearly it captured a couple bad data points that you can find and delete - You would delete from the "" tags. Then save the file and use the manual upload screen to get it back in.
Like I said, this may be more effort than it's worth. And there may be a tool/website out there that takes gpx files an "cleans" them.
"Only those who will risk going too far can possibly find out how far one can go."
-T. S. Eliot
That's excellent, thanks John. I hadn't posted it, but I had the same question, as there are clearly some blips in my data as well. I tried the same thing with the .tcx file out of the Garmin software and it looks like you can do the same thing there. That's not so hard to do I think. Trick will be finding all the data points to remove efficiently.
I was able to remove some heart rate blips like that manually before. I found them by getting the bad number from the graph, and searching for it in the correct tag in the xml for the activity. I strongly recommend making a backup of the file before playing with its contents though! You don't want to make a mistake that results in a loss of data :(
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I just got the Bike mount kit for the FR 305. It's a nice design - it comes with a new wrist band that has basically the same clip that you mount on your bike. You take the original wrist band off the watch it self and you clip it in and out of the clips either on your wrist or on your bike. It works very well, and its speedy, so pulling it off the bike and clipping onto your arm during a race will be quick.
Went to take it out for a spin last night and *horror* found that I have a flat. Not sure how or when since it went flat while hanging in the rack from the ceiling. Bummer.
Will change over the weekend and take the FR out for a ride. Got the cadence/speed meter too, but haven't installed it yet.


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I just got a Garmin Forerunner 305 after reading all the posts here about it. Actually, I bought the Polar 625X on Friday, but didn't like the interface very much, and after reading all the great posts about this stuff in the past, I took it back and got the Garmin instead. :rolleyes:
So far, having just taken it out for a walk, I like the 305 a lot.
For those of you that already own them:
What are all the cool things you can do with it that you learn from owning it, not from the manuals? What are the top 5 things you do with it on a regular basis?
Also, it seemed that the elevation and grade reading varied quite a bit. For example, if I stood still, the elevation would swing a good 10 feet or so. Is that normal? How does it read elevation? From the satelites or is there a way it can read it from air pressure or something?
Any tips/tricks or other thoughts would be appreciated! :D