I remember on Channel Four years ago they had a show called The Carrot and the Stick. On it they had two teams who by the end of the show had to complete a grueling, military obstacle course after something like a month's training, maybe even just two weeks. Both teams were divided with evenly matched teams, both with a Mr. Muscle-type weedy guy.
The 'stick' team were given boot camp style training, up at dawn, shouted at and abused, the works (think Full Metal Jacket). The 'carrot' team were given team building with camp fires and singing with the strongest of the team helping the weakest.
My favourite part was when the two teams, who had been training away from each other for the most part, had to set up a camp within yards of each other. The stick team were sent to bed early to be up at the crack of dawn while the carrot team were up drinking beer from a cooler and playing bongos and singing much to the aggravation of stick team who found it difficult to sleep and were getting right wound up. Of course, this was the point. It was actually part of the stick to be shown what a good time the others were having and to use that anger to motivate them further.

In the end the carrot team won. On the stick team they all had to make it individually. The weedy guy on their team made it though not without difficulty. The carrot team were allowed help each other so the weaker ones were being pulled and jaunted over walls etc...

So that's my story.

Close minded is fairly accurate. It means their mind never wanders too far from a set and quite narrow path