Inertia is “what happens when a body is at rest,” if I remember correctly from my high-school physics class. But it can also happen to bodies at work!
This is especially true for people who are in their middle career years, when they may feel less challenged by their jobs or lacking in direction for advancing their careers. It’s what inertia looks like in the professional realm.
If you’re not careful, that inertia could lead to stagnation, and your job could even be at risk in this time of cost-cutting (i.e., maybe your employer could get your job done with someone more junior?).
For some good tips to boost your upward mobility, check out this article about midcareer malaise, or this one about kicking your career into gear.