The benefits of exercise are well-documented, but they tend to focus on the physical. Exercise can also help you with problems in life. It's a "keystone" habit that makes a difference in so much more than your waist line.
The often overlooked but perhaps most powerful thing it does is teach you to be uncomfortable, to confront pain. In How Exercise Shapes You, Far Beyond the Gym, Brad Stulberg breaks it down.
In a world where comfort is king, arduous physical activity provides a rare opportunity to practice suffering.