"I don't have time to work out."
It's the most common excuse there is, and it makes sense on the surface. When work is busy, the gym is the first thing to go.
But here's the catch. Exercise doesn't just take energy. It gives energy back, along with a sharper mind and a steadier mood. The people who keep it in their schedule often aren't the ones with the most free time. They're the ones who figured out it makes everything else easier.
Exercise Is Brain Training
Most people think of exercise as something for the body. The brain gets a big share of the benefits too.
In 2008, researchers Charles Hillman, Kirk Erickson and Arthur Kramer reviewed the science in Nature Reviews Neuroscience. Their paper had a memorable title: "Be smart, exercise your heart." They found strong evidence that regular physical activity supports thinking skills, memory and attention, at every age they looked at.
One study stands out. In 2011, a team led by Kirk Erickson published a trial in the Proceedings of the National Academy of Sciences. Older adults who walked briskly three times a week for a year saw the hippocampus, a part of the brain tied to memory, grow by about 2 percent. A comparison group that only did stretching saw it shrink slightly over the same year.
Walking. Three times a week. That's a pretty good return.
How Much Exercise You Actually Need
The World Health Organization's 2020 guidelines give clear targets for adults:
- 150 to 300 minutes a week of moderate activity, like brisk walking or cycling. Or 75 to 150 minutes of vigorous activity, like running.
- Muscle strengthening on at least 2 days a week, working all the major muscle groups.
- Less sitting. Breaking up long stretches of sitting helps too.
150 minutes sounds like a lot until you do the math. It's about 30 minutes, 5 days a week. That's one TV episode.
Why It Helps at Work
You don't need to become an athlete to feel the payoff. Regular movement tends to help with:
- Energy. People who exercise often say they feel less drained, not more.
- Stress. Exercise is one of the most reliable ways to burn off tension.
- Sleep. Better sleep means a sharper mind the next day.
- Discipline. Keeping a promise to yourself at 6 a.m. builds the same muscle you use to keep promises at work.
That last one is hard to measure but easy to feel. Showing up for a workout when you'd rather not is practice for showing up for everything else.
How to Fit It Into a Busy Life
- Schedule it like a meeting. Put it in your calendar with a time and place. Treat it as fixed.
- Go early if you can. Morning workouts are less likely to get bumped by surprise tasks.
- Keep it short and regular. Three 30 minute sessions beat one heroic two hour session a week.
- Mix in strength. Push-ups, squats and a pair of dumbbells at home are enough to start.
- Walk more. Take calls on foot. Walk to nearby places. It all counts toward the weekly total.
Pro tip: lay out your workout clothes the night before. It removes one small decision in the morning, and small decisions are where good intentions go to die (along with the snooze button).
Note: if you have a health condition or haven't exercised in a long time, check with a doctor before starting something new.
Your Body Carries Your Ambitions
Every goal you have, you'll chase in this body. Looking after it isn't vanity, and it isn't a luxury for people with spare time.
It's part of the work. Start with a brisk 30 minute walk tomorrow, and build from there.
