The Value of "Legato" Time in the Age of AI

There's a quiet illusion spreading through the modern workplace, and it feels remarkably like progress.

You open a tool, describe a problem, and within seconds you have a structured outline, a drafted email, a synthesized research brief. It feels like thinking happened. It looks like thinking happened. Your calendar is clear, your output is polished, and you're onto the next thing before lunch.

But here's the question worth sitting with: Did you think — or did you supervise?

That distinction is at the heart of why Legato time — protected, uninterrupted thinking time — isn't just a productivity practice. In the age of AI, it may be one of the most important professional disciplines a knowledge worker can build.

Two Rhythms of Work — and Where AI Fits

The tasks on most people's to-do lists naturally have two rhythms.

Staccato tasks are short, quick, and discrete — they take 15 minutes or less. Responding to an email. Scheduling a meeting. Answering a straightforward question. These tasks have a clear input and a clear output. They don't require sustained thought. They just require doing.

Legato tasks are different in kind, not just degree. They need the deep, connected, sustained thinking that solving real problems requires — writing strategically, making a consequential decision, synthesizing complexity into clarity. These tasks can't be rushed. They need room to breathe, to develop, to arrive somewhere genuinely useful.

Here's where AI introduces a subtle but critical distortion: AI does the deep thinking so quickly, it appears to be a Staccato task.

It produces a draft, a plan, an analysis — in seconds. The output looks complete. It feels like the hard part is done. But our interaction with that output — the framing, the judgment, the integration, the decision about what it means and what to do with it — is Legato work. It cannot be skipped. And if we treat it like a Staccato task, we're not accelerating our thinking. We're bypassing it.

That is what Legato time protects. And that is why it matters more now than it ever has.

The science behind this is worth understanding — because it can inform your relationship with this new power tool called AI, while strengthening what makes you uniquely you. 

1. Pre-Polished Output Can Discourage Deep Reasoning

Cognitive scientists call it cognitive offloading — the natural almost unconscious tendency to outsource mental work to tools. We've done it with calculators, GPS, and search engines for years. But generative AI introduces something more consequential.

When a tool doesn't just retrieve information but reasons and composes, the output arrives feeling complete. Research consistently shows that people shift from active reasoning to acceptance and editing when a polished answer is already in front of them. The frame has been set. The hardest work — deciding what matters, how to think about the problem, what to prioritize — was done by the model, not by you.

This isn't a criticism of AI. It's a description of human psychology. When the hard part looks done, our brains treat it as done.

Legato time guards the front end of thinking before AI enters the picture — the space where you decide what question is worth asking and what "good" actually looks like. Bring that clarity to AI and it becomes a powerful accelerant. Skip it, and AI doesn't augment your thinking. It replaces it.

2. Skipping the Thinking Means Missing the Learning

A 2025 MIT study measured brain engagement across three groups completing writing tasks — one using ChatGPT, one using a search engine, one using no tools. The findings were striking: ChatGPT users showed measurably lower neural engagement. More tellingly, when later asked to work without AI, they had weaker recall and struggled to build on their own work independently.

They produced output. They just didn't own it.

Professional judgment isn't built through output — it's built through the thinking that produces it. The moments when you're stuck, when ideas feel hard to reconcile, when you're searching for the right logic — that friction isn't inefficiency. It's how durable expertise forms.

Legato time isn't just protected time to get more done. It's the space where capability, learning and knowledge compounds.

3. Those Who Benefit Most From AI Think Alongside It

AI genuinely can boost creativity and productivity — the potential is real. But research from MIT Sloan shows the benefits are not evenly distributed. They accrue most to people who actively reflect on how they're using AI — pausing to ask what the model got right, what it missed, and what they'd approach differently. Those who default to AI output without that reflective layer see flatter results, and in some contexts, lower intrinsic motivation over time.

The question isn't whether to use AI. It's how you collaborate with it to expand, augment and accelerate your own thinking and capability.  Which requires building the reflective layer into the front and back end of every AI encounter.

That's what Legato time provides — space for the questions that matter: What did I learn? What patterns am I seeing? Is AI sharpening my thinking or quietly substituting for it? 

The Bottom Line for Knowledge Workers

AI is not going to slow down. 

But the Legato work — the thinking, judging, deciding, and creating that makes you irreplaceable — that still belongs to you. And it always will. The question is whether you're protecting the time and space to do it.

The knowledge workers who will thrive in this era aren't the ones who use AI the most. They're the ones who think alongside it — who bring their full reasoning to every AI encounter, and take the time to absorb, reflect on, and own what comes back.

That's what Legato time makes possible. Not just better output. Better you.

Want to explore what Legato time could look like for your talent? Let's talk.

References

• MIT Media Lab (2025) — Your Brain on ChatGPT. MIT Media Lab Publications. https://www.media.mit.edu/publications/your-brain-on-chatgpt/

• MIT Sloan Management Review — How GenAI Changes Creative Work. MIT Sloan Management Review. https://sloanreview.mit.edu/article/how-genai-changes-creative-work/

• Risko, E. F., & Gilbert, S. J. (2016). Cognitive offloading. Trends in Cognitive Sciences, 20(9), 676–688. https://pubmed.ncbi.nlm.nih.gov/27542527/

STOP THINKING ABOUT WORK AFTER HOURS

I’ve long advocated for the importance of spending your evenings disconnected from work, focusing instead on truly renewing activities. Whether relaxing, socializing, spending time on hobbies or fitness, the goal is to spend our time off in a way that restores our energy and brainpower for peak performance the next day.

Yet, intense workloads and challenging projects can make it hard to turn work off at night. The tangible satisfaction of getting a few more tasks completed or solving a complex problem you don’t have time to think about during the day can cause you to gravitate back to your computer. It’s counterintuitive, but resisting the lure of work at night is a better path to performing at peak.

To help motivate you, I'm excited to share the results of a new study featured in this Harvard Business Review article: Want to Be a Better Leader? STOP Thinking About Work After Hours Published by a team of three professors in the Journal of Applied Psychology, the researchers explored how effective leaders were depending on how they spent their evenings away from work. Spoiler alert: actually proves this theory that when we turn off from work at night, we perform better at work during the day. It always makes me so happy when studies come out that prove, with evidence, things that we kind of know in our gut and maybe have even experienced. Conducted by a team of professors at Purdue, University of Florida, and Florida State University.

They studied 73 managers and a paired direct report for each. For 10 days, the managers would report whether they spent the evening thinking about work or they spent the evening truly disconnected and just enjoying their time off and how they felt in the morning. Managers felt more energized, more identified with their leader role when they had detached at night. Managers who thought about work or ruminated about work problems in the evenings came to work feeling drained and less identified and motivated to be in a leader position during the day.

So the managers felt the benefits, but what was really validating is that they the researchers then interviewed the direct reports of each of those managers at the end of every day to ask how that leader performed. For the managers who had reported disconnecting the night before, their direct reports found their leader to be inspirational and powerful all day long. Direct reports of leaders who ruminated about work in the evenings reported their leaders to be less inspirational, less effective and less valuable to them.

It always makes me so happy when studies come out that prove, with evidence, things that we kind of know in our gut and maybe have even experienced. So, I hope that you'll take this to heart. Whether you are a manager, an individual contributor, or an entrepreneur, the value of disconnecting at night and having a true shift in focus to renewal activities will make you a better worker, leader, manager, performer. By spending your evenings truly disconnected from work, work will become more meaningful and fun for you.

If those boundaries have blurred for you, claim them back. Plan your evenings well so that you have fun, engaging activities to do. Align on expectations with your team and boss about after-hours communication so you feel more confident NOT checking email. Make a very mindful transition as you close out your work day, tying your day in a bow and then go have a wonderful evening. It will make you a better performer.