What is more likely?

I've got left leg dominence (according to my Polar 725 HRM)

As I'm right footed:

either my left leg is longer and hence dominant in pedalling
the set-up of the cadence is the wrong way around

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"Ride it like you've just stolen it!"

Are you playing (or have played for years) football (soccer)?

I heard (long ago, I'm not sure) that if you are, for example, right footed your left leg is stronger because it supports your body when you are kicking, jumping etc.

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Now up on the hill is where you find us…..