Biological age
Too busy to be healthy? Three daily levers that shape how your genes behave
Quick answer
Your genes are fixed, but how they are switched on and off (epigenetics) responds to daily habits. In randomised trials, sleeping about 72 minutes more a night led people to eat around 270 fewer calories a day, and a simple home exercise plan three times a week was part of a combination that slowed epigenetic ageing in adults over 70.
"I know what I should do. I just don't have time." I hear this from founders, directors and doctors every week. The good news is that the levers with the best evidence are not time-hungry. They are about rhythm, not heroics.
Lever 1: Sleep, the one you trade away first
In a 2022 randomised trial in JAMA Internal Medicine, 80 adults with overweight who usually slept under 6.5 hours had one personalised sleep coaching session. They slept about 72 minutes more a night and ate around 270 fewer calories a day than the control group, without being told to diet.
Short sleep does not just make you tired. It changes appetite, cravings and the choices you make at 4pm.
Lever 2: Movement, little and often
In the DO-HEALTH trial, adults over 70 followed a home exercise plan of 30 minutes, three times a week. Combined with omega-3 and vitamin D, it slowed one of four epigenetic clocks more than any single measure.
You do not need a two-hour gym session. You need movement you will still be doing in a busy quarter.
Lever 3: Stress, and the recovery after it
Stress is part of leadership. The problem is stress without recovery. The British Society of Lifestyle Medicine lists mental wellbeing and healthy relationships as pillars of health alongside diet and exercise.
In a small 2021 trial of 43 men aged 50–72, an eight-week programme that included relaxation, sleep, exercise and diet guidance was linked to an epigenetic age 3.23 years lower than controls. Because everything changed at once, we cannot say how much came from stress practice alone.
What most people miss
These levers feed each other. Better sleep lowers cravings. Movement improves sleep. Recovery time makes both easier to keep up. That is why the trials that combine habits tend to show the clearest results, and why one change usually makes the next one easier.
A seven-day starter plan
- Sleep: set one fixed wake-up time, seven days a week, and put a 30-minute screen-free buffer before bed.
- Movement: book three 30-minute sessions in your calendar like meetings: brisk walking, strength work or both.
- Recovery: take five minutes between meetings to breathe slowly or step outside, at least twice a day.
FAQs
What is epigenetics in simple terms? Chemical tags on your DNA that switch genes up or down. They change with age and with lifestyle.
Can I catch up on sleep at the weekend? A fixed rhythm is the better aim. The sleep trial worked by extending sleep night after night.
Is 30 minutes of exercise enough? It is a strong start. DO-HEALTH used 30 minutes three times a week.
For the years that matter, Dr Lwin
This article is general education, not personal medical advice. If you have symptoms or concerns, speak to your GP.