My wife & I would sometimes make our sons run after practice was over if we thought they were being lazy or goofing off.
We didn't ask them to be the best players on the team or be little future pro players - we just wanted them to know we want them to do their personal best for themselves and the team.
I think it ended up paying off later in athletics. They're not the star athletes on the team but they play hard and sometimes make big plays because of it.
We've been trying a similar thing with academics. They do OK, but we always push for effort.
i wish there were some sort of field manual on this stuff, though.