“Can you hear me? We can’t see your screen. Wait, I’ll unmute my microphone. » We pronounce or hear these phrases ten times a day. In the space of a few years, videoconferencing has gone from being a futuristic technology to becoming a routine, almost banal tool. She saved our businesses during the lockdowns. It now allows us to work from our kitchen, hundreds of kilometers from our colleagues.
However, a strange phenomenon has taken hold in our professional lives. At the end of a day of online meetings, we feel fatigue of an unprecedented intensity. A heaviness that seems disproportionate compared to the simple fact of sitting in front of a screen.
It’s not an illusion, and it’s not laziness. Neuroscience now has a word for this: “Zoom Fatigue”. Investigation into the psychological behind the scenes of a tool that has revolutionized work, but which silently exhausts our brains.
1. The anatomy of exhaustion: why video emptying our brains
To understand the problem, we need to analyze what is going on in our heads during a video call. In real life, a conversation flows. Our brain picks up dozens of non-verbal signals: a slight movement backwards, a discreet sigh, the rhythm of breathing, or a passing glance. We process this information without apparent effort.
In videoconferencing, this natural decoder is totally confused.
The cognitive cost of lag
The first culprit is invisible. This is the micro-time shift. Even with an excellent connection, there is always a delay of a few milliseconds in voice and image transmission.
Psychology researchers have shown that a delay of just 1.2 seconds unconsciously causes participants to perceive their interlocutor as less friendly or less focused.
To compensate for this lack of fluency, our brains have to work twice as hard. He desperately searches for visual cues that are often blurry, pixelated, or cut off at shoulder level. This is called cognitive overload. We strain our attention, and this constant tension ends up creating mental exhaustion at the end of the day.
2. The mirror trap: the “permanent gaze” effect
Imagine that an office colleague sits across from you, fifty centimeters from your face, and stares intensely into your eyes for two hours without ever blinking. You would find it aggressive and deeply uncomfortable. However, this is exactly what videoconferencing reproduces.
On a screen, the faces of our interlocutors often appear much larger than in reality. For our archaic brain, this prolonged physical proximity is interpreted as a situation of confrontation or forced intimacy. As a result, our body secretes cortisol, the stress hormone.
The distorting mirror
Added to this is the absolute trap of video: our own camera return.
In what physical meeting do you spend your time looking in the mirror to check your hairstyle, your posture or the expression on your face? Absolutely none. Online, we are constantly faced with our own image. This phenomenon triggers a permanent and unconscious self-evaluation. We become spectators to ourselves, which adds an invisible but exhausting mental load and anxiety.
The cycle of digital fatigue is often summarized as follows:
- The connection: We turn on the camera. The brain goes into “hyper-vigilance” mode.
- Attention effort: We stare at the screen to prove that we are listening (“visual presenteeism”).
- Self-analysis: We keep a constant eye on our own image to control our appearance.
- The crash: After four meetings, the mental energy gauge is at zero.
3. The paradox of connection: connected online, cut off from the world
Videoconferencing has been sold as the ultimate tool for remote social connection. It allows us to maintain contact, of course, but it also has a pernicious side effect: it desensitizes our working relationships.
In a traditional office, a meeting never starts abruptly. There’s the walk in the hallway, the formal hello, the joke shared while sitting down, and the coffee ritual. These informal moments are not a waste of time. They constitute the cement of trust and cohesion of a team.
The cold efficiency of digital
In video, the informal disappears in favor of sometimes surgical efficiency. We click on a link, the meeting starts this second, we scroll down the agenda, then we click on “Leave the meeting”. The disconnection is instantaneous.
This lack of transition creates a feeling of solitude and virtualization of human relationships. Colleagues become square thumbnails on a 13-inch screen. In the long term, this emotional distance reduces employee engagement and dulls the feeling of belonging to the company.
4. Towards an ecology of meetings: how to save our weeks
The problem is obviously not the tool itself, but the excessive and thoughtless use that we make of it. To preserve the mental health of teams, it is urgent to move from an “all-video” culture to true digital hygiene.
Here are the simple rules that the most modern companies are starting to put in place:
- The telephone reflex: Not all discussions need visual support. A classic phone call allows you to take your eyes off the screen, and even offers the luxury of walking while you talk.
- Hide your own video feedback: Most software (Zoom, Teams) now allows you to hide your own image from others without seeing it yourself. This instantly removes mirror anxiety.
- Reduce the default duration: Why should a meeting last 60 minutes? Changing the formats to 25 or 45 minutes allows you to take real breaks to stretch, drink a glass of water and let your brain breathe.
The balance sheet of the two worlds
To better visualize the impact of our organizational choices, here is a comparison of current communication methods:
| Meeting mode | Main advantage | Cognitive cost | Best use case |
| Videoconferencing | Practical for large groups at a distance | Very high (Visual and attentional overload) | Short team points, technical screen sharing. |
| Phone Call | Mobility, concentration on voice alone | Weak (Allows movement and rest of the eyes) | Face-to-face discussions, informal brainstorming. |
| Physical Meeting | Human Connection and Real Nonverbal Cues | AVERAGE (Requires moving, but regenerates the link) | Recruitment, conflict resolution, creative workshops. |
Conclusion: Rehumanizing the screen
Videoconferencing is now part of our professional DNA. It won’t disappear, and that’s good for our flexibility. However, we need to stop viewing it as a perfect substitute for real-life interactions.
The challenge this year is no longer how to use these technological tools, but when to learn to turn them off. Protecting the attention and energy of employees when faced with screens is no longer a simple comfort detail. It has become a public health issue at work, and the sine qua non condition for building sustainable, efficient and, above all, deeply human organizations.
