- Whats more accurate, a Garmin or iphone?
A little while ago I was on a ride with a mate, we did 20 miles on road but on checking the data of our rides on strava there were significant differences in the figures. We are both the same age, height and weight, rode side by side on the same course, our mileage was only a few yards out but calories was near on 400 different and wattage around 100 different. I was using my Garmin edge 25 uploading to strava via Garmin connect, mate used his iPhone and direct in to strava, neither of us had any other sensors like heart rate, cadence or power.
So which would be the more accurate?Posted 1 month agoYakSubscriber
I think all the calorie/power data for both is entirely made up. If you had a big pub lunch then go for the bigger figure 😉
For the rest, probably the iPhone. My garmin 200 undermeasures compared to my mates iPhone and other more expensive garmins. The 25 is just the newer 200 isn’t it?Posted 1 month agocookeaaSubscriber
So which would be the more accurate?
Neither is more “accurate” they’re just gps tracks, the Calories and Wattages are estimates based on that plus whatever other data/information you’ve provided to Strava.
For example it takes account of the type of bike you tell it you are using, try editing your ride and telling it you used an MTB and then change it to a Road bike, I bet the estimated figures change significantly…
The fact that you basically did the same route at the same time matters not a jot to strava’s al-gore-rhythm, if you’ve told it you weigh 20kg more and you’re using a Fat bike, it will estimate your Calorie use / power output as being higher than your svelte buddy on a Road bike…
Crap in, Crap out is the old adage I believe.Posted 1 month agocookeaaSubscriber
Actually OP it is worth getting a HR Strap to use with your Edge 25, it’s about the most useful £30 you can spend on and item of “Sports science” kit (IMO). Both because it gives a more accurate picture of the work you’re body has done over the course of a ride, and allows you to gauge your current workload and adjust as appropriate during a ride.Posted 1 month agoSuperficialMember
Garmin has always calculated things differently to Strava – for example I’m pretty sure that GarminConnect ‘trusts’ your device’s elevation data whereas Strava cross-references your GPX position with (OS?) maps to calculate elevation. I presume that’s why I can see different cumulative height on GarminConnect vs the same upload when copied into Strava. That doesn’t explain why two similar rides on Strava can have such wildly different calorie data, though. Are your weights (according to Strava profile) similar? Do the elevation profiles of the rides appear similar?
Riding with my mate who uses an iphone and I have an 820 + HRM, his calories burned figure is usually double mine on every ride.
Is that off-road? If so, that’s my experience too. I guess the algorithms that calculate energy expenditure based on height gained don’t take into account how smooth or techy trails are. We all can appreciate that riding 100m of vertical on a road vs riding on a rocky singletrack parallel to the road.
I always get a higher calorie count when I’m using HRM but on the road the difference is not that much. Off road the difference can indeed be twofold IME.Posted 1 month agoampthillSubscriber
If I use my watch to monitor a ride then Strava trusts the height data and gets out wrong. You can ask Strava to correct it but only on the web page. Which is annoying
So, ironically, it’s less hassle to use my phone as Strava doesn’t it so cheers the elevationPosted 1 month ago
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