John Vance

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Latest activity by John Vance
• John Vance commented,

Eric, It sounds like something is badly misconfigured in your Garmin to Strava link.  The recalculation that I see is moving time.  Strava tends to calculate that as a little longer, therefore incl...

• John Vance commented,

Are you using a power meter?  If so, how many kilojoules did it report? If not, was this a road ride or a MTB ride?  Without a power meter Strava will drastically under report calories for an off r...

• John Vance commented,

One quick hack Kirsten - set your weight to 0.78 * your actual weight.  Now your calorie burn will be in the ballpark. @elle someone looked at my support post but no action has been taken.  I guess...

• John Vance commented,

That's based off of a paper validating a prediction formula to use on study populations to determine energy expenditure.  The correlation is decent without VO2 max for a group of individuals but sl...

• John Vance commented,

The science that backs up what I say: http://d3epuodzu3wuis.cloudfront.net/R060.pdf   NO difference in efficiency between recreational cyclists and UCI pros.  The difference is purely power output,...

• John Vance commented,

Without a power meter, Stava's dirt road estimates can be low, since it is estimating your power based on speed, grade and your weight.  Obviously you're going to go slower on a gravel climb or a m...

• John Vance commented,

> When you factor in "human inefficiency on the bike (about 26%)", that explains exactly why Strava calculations are less accurate than everyone else's.  Human inefficiency depends on physical cond...

• John Vance commented,

I just posted this to support:   This is a follow-up to your previous request #536488 "Re: Turn ridiculous calorie count off, or disconnect from HealthKit"Previously you had posted this formula for...

• John Vance commented,

If you have a power meter, Strava will estimate your calorie burn as1.15 Calories -  4.7kj roughly - for every 1kj expended.  This assumes 21.5% human efficiency, whereas Garmin will assume about 2...