Can you actually get kidney trouble from exposing your lower back to the cold?

[rogerzilla]

I jokingly tell my riding partner this will happen (he doesn't like b*bshorts and is too tall for most of his jerseys) but is there any truth in it?

[mrcharly-YHT]

Dunno, but it makes me pee a lot.

[CrazyEnglishTriathlete]

I don't know, but early experience of cold audaxes and finding myself unable to eat well at controls prompted me to invest in a Goretex kidney warmer - which I use for all cold rides and sometimes in summer 600s where there will be nightime descents. 

[hellymedic]

Being generally cold makes anybody pee more.

Vasoconstriction returns peripheral blood to the central circulation and the excess circulating volume gets dumped by the kidneys.

Rewarming folk need to replace this...