Add a Comment

Comment by Dahondude 14 hours ago

Hi Rob

For Q1 you could do it manually, though it might be a fiddle. You can calculate the wattage needed to ride along a known length of road with a known vertical gain for a certain time (power needed = bike + rider weight (kg) x 9.8 x elevation gain (metres) / time (seconds) = power (watts). Add 10% for rolling and air resistance.). Or visa versa, if you know wattage, road length and vertical gain you should be able to calculate overall time. You could then ride that climb at whatever speed you want, and modify the file off your garmin by changing the time column to match the required time. Upload this back onto the Garmin and use it as a course. It would be a little fiddly to get right given Garmins sample every second (or maybe less).

For example- The Old Freeway = 8.8 km with a vertical gain of 440m

So for me: (10kg (bike) + 70kg (me))x 9.8 x 420/25x60 (25 min climb) = 241Watts (with the 10% added) which is pretty close to the Strava estimate of my power for my best time on that Segment.

So lets say I want to ride at 300W - Time = (10+70)x9.8X420/(300/1.1) = 20min.

So I go and modify an existing Garmin file with that segment and set the start time =0, end time =20min and then spread the time intervals for each GPS point evenly between these two extremes. Knowing that the Old Freeway isnt a constant gradient, your VTP will sometimes get ahead of you (on steeper sections) but you should catch him up on the flatter sections.

Make sense?

Comment by Rob Wood 19 hours ago

Few things on my mind thought I would throw out to the strav group

1. Does anyone know of any webtools that will develop a garmin "virtual partner" for a specified segment based on a designated wattage? Im aware this may be difficult due to inaccuracy in elevation data but this would be very useful for longer climbs.

2.  Given all the garmin elevation data strava must have on record, surely they could be utilising this to develop improved local elevation information. Not only would this be useful for their own services but I imagine with such a large data source it would be fairly accurate and they could sell this information back to google and others?

Comment by Tim B on Sunday

Phil's link to the Strava activity doesnt work any more, looks like either the activity or account has been deleted....

Comment by Tim B (the running man) on Saturday

Had a look at the rest of his activities, they are all pretty weird, look like he is on a trail bike in the middle of the state or something. I have flagged a few.

Comment by Tim B on Saturday

I was going to say its just another dodgy Strava GPS short segment anomoly, but looks like that banana actually did do those speeds, should send it to the cops, but then they might check out some other rides, maybe mine..... :)

Comment by Phil Crick on Saturday

Another clown:

http://app.strava.com/activities/54805356

Max speed of 153kmh, isn't that an instant ban and you get your vehicle confiscated for a while?

I have flagged it.

Comment by Darren on May 13, 2013 at 12:04

Uh oh! Tim B just broke Strava!

Now get out there, have fun and be safe.

-Your friends at Strava

Comment by Tim B on May 13, 2013 at 11:49

Thanks Lorraine, tried it again and still having problems. Tried setting up a new account to log a job with, no dice, tried clearing all my cookies and browsing data, no dice, have tried a different internet provider, no dice. Worst part is I cant log a job for them to look at it! Might need to send you an email so you can log a job on my behalf :)

Comment by Lorraine C on May 13, 2013 at 10:54

Tim, I've just logged on to the support link without problems (for some reason my walks have been recording double km's!!)

Comment by Tim B on May 13, 2013 at 9:45

Is anyone else having trouble logging into the Strava support system?
I can log into the usual dashboard ok, but when clicking on the support link and trying to log in to that, it logs me out of Strava completely. Tried on various devices, found it like that yesterday and again today.

• ‹ Previous
• 1
• 2
• 3
• …
• 31
• Next ›
• Page