Besides just a study like this, I feel a noticeable difference when running with tight leggings on compared to lose shorts. (liftingrevolution.com)
When you spend 36 hours in a van, the last thing you want to do is pull on another pair of tight leggings. (self.com)
The back bench seat is locked into place, making for tight leg room in the back if any front passenger / drivers are tall and need the leg room. (autolist.com)