Trying too hard in a social setting makes it harder to connect authentically with someone else. Trying too hard for a promotion can reek of desperation and, therefore, make you seem less desirable. Trying too hard to get to sleep can make it almost impossible to wind down. Trying too hard to look intelligent rarely impresses the people you want to impress. Trying too hard to be cool, to relax, to feel good, all make it harder to be cool, relax, or feel good. That’s the trouble with overexertion.