Not sure if this has been discussed here before or not.
I've only ever had boys and a few have been consistent wheel runners in their younger days although most taper off in their older years.
In my observation I have only seen them run clockwise on the wheel. Scientifically i was wondering if theres any data to support that. Similar to what they have found in the grazing patterns of cattle. Pure curiosity involved, what do your own male or female rats do?