Efficiency => slower is better?


#1

So- I went for a standard run. The mileage that RS calculated was 7.4 miles. Actual is 6.0. So- I was “average” efficiency when running farther, but when I manually adjusted the mileage, it became “high”. (See before/after shots below).

This is a bit counter-intuitive for me. Why would my efficiency go up?
Also- I’m surprised that my RS hasn’t really calibrated for me. Do I need to re-calibrate or ???
thanks!


#2

Hi @jim.lucas – our Community Comparison is using runs from the RunScribe databank to make the comparison, looking at your metrics (Flight Ratio in particular) at your pace. So where you’d be Average @ a 5:27min/mi pace, you would be considered High for a 6:50min/mi pace.

As far as the calibration goes, it should get pretty good after ~3 calibrated runs (where you’ve corrected the distance). Mounting location and different shoes can also affect the distance calculations.


#3

Hi Tim,

thanks for the response… it doesn’t make sense to me though. I’ve speculated a bit on where the error could be. I would imagine that I would be one of the few “data points” @ a 5:30 pace, thus the average rating. How is flight-ratio calculated?


#4

Hi @jim.lucas – flight ratio is the % of time that you’re in the air (neither foot is on the ground).
We calculate it as follows :
Flight Time = (CycleTime - 2*ContactTime) / 2 [Note: CycleTime is the inverse of Step Rate]
Flight Ratio = FlightTime / (FlightTime + ContactTime)

Flight Ratio naturally tends to get higher as your pace increases, so if you’re, say 23% at a 5:30 pace, that might be Average, but 20% at a 7:00 pace would be High. Hope that helps.


#5

Does the heel position tend to overestimate distance in comparison to the laces position?


#6

I don’t recall seeing this as any kind of pattern, and I’ve done quite a few runs using 4 pods, 2 laces / 2 heel.


#7

Now that’s interesting - one pod on each mounting to check the difference that the pods might ascribe.

I made the mistake of running yesterday with the pods on the laces and calibrated for the heels and the results were stunning - the pods recorded me as stationary for 2/3 of the total run time, and huge differences between each foot (that haven’t existed before).