Too much videoconferencing over the past year may have led to what some researchers are calling “Zoom fatigue.”

A recent study published by Stanford University communications professor Jeremy Bailenson concludes that too much Zoom use can cause fatigue. The reasons cited include: excessive amounts of close-up eye gaze, cognitive load, increased self-evaluation from staring at videos of yourself, and limitations in physical mobility.

Because Bailenson studies how people interact virtually, his arguments are grounded in academic theory and research. He’s outlined some of his findings in a peer-reviewed paper and shared some of the psychological consequences of Zoom fatigue, theories he plans to test further.

“An unintended consequence of a free, robust video platform is that it becomes harder to say no to meetings you couldn't attend in person,” Bailenson told Lifewire in an email interview.