They did things like turning off location tracking in their smart phones.

他们做了一些事情，比如关闭智能手机中的位置跟踪。

The so-called 'acey-deucy' stirrup placement, in which the rider's foot in his left stirrup is placed as much as 25 centimeters lower than the right, is believed to confer important speed advantages when turning on oval tracks.

所谓的“acey-deucy” 马镫放置，即骑手在左马镫上的脚比右马镫低 25 厘米，据信在椭圆形赛道上转弯时具有重要的速度优势。