Outside of the home, extracurriculars have been found to correlate well with student outcomes like better grades, higher self-esteem, and lower delinquency. In particular, the longer and the more intensely you engage in an extracurricular, the better the outcomes.
The cited studies:
A few reasons:
But where is the causation? Do extracurriculars train grit, or do more gritty people happen to just participate in more extracurriculars?
Duckworth argues it’s both – follow-through requires a baseline of grit, then builds it at the same time. This is the "corresponsive principle" – the traits that steer us toward certain life situations are the same traits that those situations reinforce.
This can lead to both virtuous and vicious cycles. Someone who is encouraged to try and try again, against her comfort, may experience the satisfaction of a breakthrough. This may then encourage the child to try even more difficult things, then to welcome challenge.
The Dean of Admissions at Harvard College says these students stand out: students who "have made a commitment to pursue something they love, believe in, and value – and have done so with singular energy, discipline, and plain old hard work." He argues that the experience of persevering through obstacles teaches valuable lessons, and that this grit is then transferrable to something else.