For preschoolers, this may not only lead to trouble falling asleep one night, but to chronic problems feeling sleepy at bedtime. (sciencedaily.com)
Lack of ability to control the knee can lead to trouble in sports where athletes are continuously jumping and landing on their feet (basketball and volleyball for example). (dailyburn.com)
I've written before about the ways you can recognize employees, and how failure to do so can lead to trouble with employee retention. (inc.com)