Written by the Nuvirox Research Team
Key points
- Calls strip away body language, so your brain works harder to follow meaning from voice alone — effortful listening that genuinely tires you.
- Video calls add a second load: constant self-monitoring and slightly delayed, unnatural turn-taking.
- Mental fatigue from calls is normal; persistent exhaustion from minimal cognitive effort is worth a closer look.
Short answer: a long call is real cognitive work, not just talking. On a phone or video call your brain loses the visual cues it normally leans on — facial expressions, gestures, eye contact — and has to reconstruct meaning from voice alone. That effortful listening, sustained over time, is genuinely fatiguing, which is why you can feel flat after hanging up.
Why is a call more tiring than talking in person?
Because in-person conversation is multi-channel. You read tone, expression, posture, and timing all at once, and your brain integrates them effortlessly. On a call, most of those channels disappear or degrade, so your brain has to fill the gaps — inferring meaning, emotion, and intent from audio alone. That extra processing is a sustained cognitive load you don't consciously notice until you're spent.
Why do video calls feel even worse?
Video adds loads in-person talk doesn't have: you're watching yourself, holding eye contact with a camera, and navigating tiny audio delays that disrupt the natural rhythm of turn-taking. Each demands attention. It's a form of mental rather than physical fatigue — the kind explored in mental fatigue versus physical fatigue — and it explains why a day of calls can leave you as drained as hard labor.
What the research points to
Effortful listening taxes cognitive resources. Research on listening effort shows that understanding speech under degraded conditions — missing visual cues, imperfect audio — recruits additional attention and working memory, and sustaining that effort produces measurable fatigue. Calls are a textbook degraded-listening condition.
Mental work shows up as real tiredness. Studies of sustained cognitive demand find that prolonged focus depletes subjective energy and impairs subsequent performance, even without physical exertion — consistent with feeling wiped after back-to-back calls.
When mental fatigue is more than call fatigue
If you feel exhausted after minimal mental effort, or notice focus and stamina slipping well beyond what a call should cost, that broader pattern is worth raising with a clinician rather than attributing to calls alone. Persistent cognitive fatigue can have medical, sleep, or mood-related causes. The call-specific tiredness here is expected; outsized or generalized mental exhaustion is a different conversation, related to feeling mentally drained on easy days.
How to make calls less draining
Build short breaks between calls so your attention can reset — even a few minutes helps. Turn off self-view on video to drop the self-monitoring load. Use audio-only when video adds nothing. And protect genuine recovery afterward rather than stacking more focus-heavy work. These pacing habits do more than any supplement; cellular-energy support is about a different layer than the attention drain of a call.
What people often notice
Since remote work expanded, call fatigue has become something people describe constantly: a day of back-to-back calls leaves them as flattened as a physically demanding day, despite barely moving. The specific complaints are telling — video calls are reported as more draining than audio, long calls worse than short, and unfamiliar voices or poor connections worst of all. Each of those maps onto the effortful-listening explanation: the harder it is to extract meaning, the more the call costs.
People also widely report the self-view drain on video — the low-level discomfort of watching themselves — and many find turning it off makes a real difference. The relief people get from small adjustments (audio-only, breaks between calls) suggests the fatigue is genuine cognitive load, not imagination.
Why breaks between calls help so much
Sustained attention depletes, and stacking calls without gaps gives it no chance to recover — so by the fourth or fifth, you’re running on fumes. People who insert even short breaks between calls consistently report finishing the day with more left in the tank. It’s the same attention-recovery principle that helps with feeling mentally drained on easy days: the load is cognitive, so the recovery has to be cognitive too.
Taken as a whole, call fatigue is best treated as the real cognitive cost it is. Your brain is doing extra work to extract meaning without its usual cues, and on video it’s monitoring you on top of that. Build breaks between calls, drop self-view, default to audio when video adds nothing, and protect recovery afterward. Those pacing habits address the actual load; a broader pattern of exhaustion from minimal effort is the part worth raising medically. One more useful habit: batching calls with deliberate gaps, rather than scheduling them wall-to-wall, respects how attention actually recovers. A five-minute walk or a look out the window between calls resets more than it seems. The cost is real cognitive work, so the recovery has to be real too — you can’t out-discipline a depleted attention system, you can only let it refill.
Frequently asked questions
Why am I exhausted after a day of calls but fine after a busy in-person day?
In-person conversation gives your brain the visual cues it evolved to use, so it's lower-effort. Calls strip those cues and force compensatory processing, which accumulates as mental fatigue.
Is video-call fatigue a real thing?
Yes — the combination of self-monitoring, camera eye contact, and small audio delays adds genuine cognitive load on top of effortful listening, which is why video can be more draining than audio.
Does turning off self-view actually help?
Many people find it does — it removes the constant self-monitoring that quietly consumes attention throughout a video call.
Would an energy supplement help with call fatigue?
Not directly — this is attention and listening load, best managed with pacing and breaks. A supplement addresses a different layer than focused mental effort.
FROM NUVIROX
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Learn more about NAD+ Restore →The bottom line
A long call tires you because your brain is doing extra work — reconstructing meaning without the visual cues in-person talk provides, and on video, monitoring yourself on top of that. It's real cognitive load. Pace your calls, kill self-view, and protect recovery. If minimal mental effort leaves you exhausted, that broader pattern deserves a doctor's input.
References
- Martens CR, Denman BA, Mazzo MR, et al. Chronic nicotinamide riboside supplementation is well-tolerated and elevates NAD+ in healthy middle-aged and older adults. Nat Commun. 2018;9(1):1286. PMID: 29599478.
- Puetz TW, Flowers SS, O'Connor PJ. A randomized controlled trial of the effect of aerobic exercise training on feelings of energy and fatigue in sedentary young adults with persistent fatigue. Psychother Psychosom. 2008;77(3):167-174. PMID: 18277063.
These statements have not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure, or prevent any disease. This article is for informational purposes only and is not a substitute for professional medical advice.