AI Productivity Causing Burnout, Study Finds "AI Brain Fry"

Harvard Business Review study suggests AI can expand worker capabilities but also lead to cognitive overload.

Published on Mar. 8, 2026

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A new study published in Harvard Business Review suggests that instead of making work easier, AI may be giving some workers what researchers are calling "AI brain fry." The study found that people constantly bouncing between multiple AI tools reported more decision fatigue and errors, with about one in seven workers saying they had experienced mental fatigue from juggling AI tools at work. The study found a striking paradox: AI can both reduce burnout and create it, with workers who had to constantly supervise multiple AI systems or juggle several tools at once experiencing increased mental strain.

Why it matters

The findings are an 'early warning sign' that expectations around AI productivity may need recalibrating, as the technology expands what workers can do but also what they're expected to do. If businesses don't figure out how to better integrate AI while avoiding cognitive overload, it could lead to more mistakes, slower decision-making, and higher worker fatigue.

The details

Researchers surveyed about 1,500 workers and found that people constantly bouncing between multiple AI tools reported more decision fatigue and more errors. About one in seven workers said they had experienced mental fatigue from juggling AI tools at work. The study found that when workers had to constantly supervise multiple AI systems or juggle several tools at once, mental strain increased sharply. By contrast, when workers used AI to actually offload repetitive tasks, their stress levels dropped.

  • The study was published in Harvard Business Review in March 2026.

The players

Julie Bedard

Managing director and partner at Boston Consulting Group and an author of the study.

Jack Downey

Head of Strategy, Operations and Product at Webster Pass Consulting, who uses AI daily to build automation systems and finds there is an additional mental strain that comes from AI workflows.

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What they’re saying

“The AI can run out far ahead of us, but we're still here with the same brain we had yesterday.”

— Julie Bedard, Managing director and partner at Boston Consulting Group (CBS News)

“There's a point that usually happens after a full day where I just kind of feel exhausted in a way that I didn't feel in a normal work day before AI.”

— Jack Downey, Head of Strategy, Operations and Product at Webster Pass Consulting (CBS News)

What’s next

The study's authors suggest that leadership and training could play a critical role in mitigating 'AI brain fry', as less burnout was seen among employees whose managers were intentional with their AI use.

The takeaway

While AI can expand worker capabilities, the study shows it can also lead to cognitive overload and burnout if not properly integrated. Businesses will need to rethink how they design work to avoid the pitfalls of 'AI brain fry' as the technology becomes more ubiquitous.