DispatchMay 2026 · 9 min read
I Don't Have Time to Exercise (And Other Lies the Calendar Tells)
It's the most common reason people give for not training. It's also the most defensible-sounding lie we tell ourselves. Here's what 25,000 wristwatches and a question about stairs have to say about it.
By FG Samartsidis · Filed under: Habits, Everyday Science, Motivation
I. The lie we all believe
Almost everyone who doesn't exercise says the same thing: "I don't have time." It sounds reasonable. Calendars are full, work is long, kids exist, sleep is short. But here's what's strange — when researchers actually measured what people do all day, the "no time" people had roughly the same number of free hours as the people who trained four times a week. The difference wasn't the hours. The difference was what happened inside them.
A 2023 review of time-use surveys across multiple countries found that people who exercise regularly and people who don't have, on average, within 15 minutes per day of each other in available leisure time. Both groups had roughly 4–5 hours per day of unstructured time. The exercisers weren't busier. They had decided differently. This isn't a moral judgment — it's just an observation about what "no time" actually means as an explanation. It's usually a translation of something else: tired, unmotivated, overwhelmed, unsure where to start. All real. All legitimate. But all different from "no time."
II. The minute audit
The honest question.
Before you say you don't have time, count three things in the last 24 hours:
- How many minutes you spent on your phone (most phones tell you this — Settings → Screen Time / Digital Wellbeing).
- How many minutes you watched something on a screen — TV, YouTube, Netflix, reels.
- How many minutes you spent waiting — for food, in traffic, in line, between things.
Now ask: was the time the problem, or was it where the time went?
The average adult in Europe spends 3 hours 45 minutes per day on a smartphone and another 2 hours 30 minutes watching video content. That's 6+ hours daily. The question isn't whether you have 20 minutes to exercise. The question is whether 20 of those 375+ phone-minutes can be re-routed. For most people, the answer is yes — the obstacle isn't the calendar, it's the friction of stopping the easy thing to start the harder thing.
III. The 4-minute study that broke the rules
In 2022, researchers at the University of Sydney published a study in Nature Medicine that quietly changed how we should think about exercise. They tracked 25,241 adults who said they did no formal exercise — using wrist-worn devices for nearly 7 years. They were looking for something specific: short, vigorous bursts of movement embedded in daily life. Climbing stairs fast. Running for a bus. Carrying heavy shopping. Playing with kids on the floor. They called it VILPA — vigorous intermittent lifestyle physical activity.
What they found was almost unfair to the gym industry.
The Sydney VILPA Study — what 4.4 minutes a day did
Participants who accumulated just 4.4 minutes per day of vigorous bursts (in 1–2 minute chunks) had:
- 26–30% lower risk of dying from any cause
- 32–34% lower risk of dying from cardiovascular disease
- 26–30% lower risk of dying from cancer
Compared to people who did zero vigorous bursts. Three short bursts per day. One or two minutes each. No gym. No clothes change. No shoes.
The detail that most people miss in this study: the participants were not exercisers. They weren't doing yoga at lunch or going for evening jogs. They were ordinary people whose ordinary day happened to contain bursts of effort — usually because they walked uphill, climbed stairs, or hurried somewhere. The body doesn't care if you call it "exercise." It only cares if you raise your heart rate hard enough, often enough, for long enough. Your daily life can do that for you, if you let it.
A follow-up 2025 study using US data found similar results: just 1.1 minutes per day of these brief vigorous bursts was linked with a 39% lower mortality risk compared to none. Not 30 minutes. Not even 10. One minute and six seconds.
"The body doesn't ask for an hour. It asks for an effort. A staircase taken seriously, three times a day, is a workout."
V. The interactive: How much time do you actually need?
Use the calculator below. Be honest about your week. The number it gives you is the smallest dose of vigorous movement that the science suggests does something — not what's optimal, but what matters compared to zero.
The Minimum Effective Dose Calculator
Based on the Sydney VILPA findings.
"That's around 5 minutes of vigorous bursts — three short stair-climbs, a brisk walk uphill, a few sets of squats while the kettle boils. The Sydney study would put you at roughly a 30% lower mortality risk than someone who does nothing."
This is a thought tool, not a medical guideline. The point is to see the trade your day is already making.
The math behind this widget is real. The 4.4 minutes/day figure comes from the Sydney VILPA study (Stamatakis et al., Nature Medicine, 2022). The 12-minute plateau is from follow-up dose-response analyses. The "phone minutes" baseline is the 2024 European average from Statista. None of this is to shame anyone — phones aren't the enemy, and rest is real. It's just that most people who say "I have no time" have never honestly counted where their time goes.
VI. What "exercise snacks" actually look like
The science calls them "exercise snacks" — short, deliberate bursts of effort, two to three times a day, lasting under 5 minutes each. McMaster University ran a 6-week study in 2019: sedentary young adults climbed three flights of stairs, three times a day, three days a week. That's it. By the end, their cardiorespiratory fitness had improved measurably.
Here's what one realistic day of exercise snacks looks like:
A non-exerciser's day, slightly rearranged
Climb the stairs to the office instead of the lift. Two flights, fast.
~50 seconds
While the kettle boils, do 20 squats.
~45 seconds
Walk to lunch the long way, deliberately fast for 90 seconds, then normal pace.
~90 seconds vigorous
Take the stairs up to your apartment two at a time.
~60 seconds
Push-ups during a TV ad break. As many as you can in 60 seconds.
~60 seconds
Total vigorous time: ~5 minutes.
Total time stolen from day: 0 minutes (you were going there anyway).
Notice what isn't on this list: changing clothes, going to a gym, scheduling, showering after, packing a bag. The exercise snack model removes every single piece of friction that makes traditional workouts hard to start. You don't have to stop being your normal self — you just turn parts of your existing day up to eleven for 60 seconds at a time. For people who haven't trained in years, this is often the only ladder back into movement that actually works.
VII. So what do you do tomorrow?
Three things, none of which are "join a gym."
- Pick one staircase you take every day. Tomorrow, take it fast. Two steps at a time if you can. That's it. Repeat every day.
- Pick one waiting moment — kettle, microwave, ad break. Fill it with movement. Squats, push-ups, calf raises. Whatever you have space for.
- Walk somewhere fast for 90 seconds today — the corner, the kitchen, the bus stop. Just once. Hard enough that you'd struggle to hold a conversation.
That's roughly 3–4 minutes. According to the largest wearable study ever done on this question, that's already most of the way to the curve.
Will this make you an athlete? No. Will it make you fit enough to play a hard match of tennis or run a 10K? Also no. But that's not the comparison the studies are making. The comparison is between you and someone who does nothing, and that comparison is brutal: every metric of long-term health bends sharply in your favor with just a few minutes of effort per day.
The "no time" excuse dissolves once you see it for what it is: not a fact about your calendar, but a story about what counts as exercise. The story is wrong. A staircase counts. A walk uphill counts. Sixty seconds of squats while the kettle boils counts. The only thing that doesn't count is zero.
Filed under everyday science. The author writes these between training sessions — usually while the kettle is boiling.