Is running speed determined by distance, coins or score?

As a strategic motive, I would like to speed up less, but I don't know how running velocity is calculated?

• Is it fixed to the meters run, so not much can be done about it?
• Or to coins, so I could collect less coins if my primary goal was to maximize distance or score?
• Or is the speed caused by your score, or perhaps something else altogether?

P.S. Found some helpful tips on how to temporarily slow down here: Does anything slow down or reset running speed?

The Temple run series is like jetpack joyride, it is based on momentum. You collect speed over running and the most efficient way to lose it is to 'resurrect' by using gems or wings depending on which game you play.

Tripping, or collecting powerups, has nothing to do with your speed.

In Temple Run 2, I have noticed consistently that when the random resurrection spin comes up with the with the speed boost, the running speed after the boost wears off is noticeably slower. Many of my longest runs came about from happening to roll that boost a couple of times after deaths.