High-performing leaders often share the same instinct when demands increase: work longer hours.

More meetings. More email. More late nights.

But the research is clear. This approach eventually backfires.

Time is finite.
Energy is renewable.

In their well-known Harvard Business Review article “Manage Your Energy, Not Your Time,” Tony Schwartz and Catherine McCarthy argue that sustainable performance depends less on how many hours you work and more on how effectively you manage and renew your energy.

For leaders who steward their performance intentionally, that distinction matters.