You woke up this morning promising today would be different. Maybe you'd finally start that walk after dinner. Or drink more water. Or get to bed instead of scrolling your phone.
But here you are, hours later, making the same promise for tomorrow. You keep telling yourself you'll "start Monday", and Monday keeps becoming next Monday.
Here is what the wait costs. Seven untrained men rode an exercise bike for an hour, and then the way their bodies handled sugar was measured. Straight afterwards, insulin worked better in them than at rest. Two days later, it still did. Three of them were checked again at five days, and the effect had gone. The body pays wages, not a pension: it pays for today's effort today, and stops paying within days. It optimises for the life you are living now, not the life you plan to live someday.
The body keeps short accounts
Those seven men are the clearest example of something that shows up all over the body: much of what exercise does, it does for a day or two.
Blood pressure works the same way. After a single session of endurance exercise, it stays lower for up to 22 hours. In people whose pressure is high, one session lowers it by about 5 to 7 points, about as much as weeks of training do.
The account can be shorter still. 19 overweight adults aged 45 to 65 spent three days mostly sitting. On one they sat straight through. On the others they got up every twenty minutes for two minutes of walking, gently on one day and briskly on the other. After the same sugary, fatty drink, both kinds of break cut the rise in blood sugar by 25 to 29%, and the insulin needed to handle it by about 23%. Two minutes. That is one advert break.
Meals keep an account of their own. How to Fix Blood Sugar Spikes Naturally has what a ten-minute walk after each meal did to blood sugar, against the same walking done in one go.
So a good session is real, and its effect on your blood sugar has worn off before the week is out. That is why the body wants something most days, and why today's walk is worth more than a better plan for next week.
One short night
It runs the other way too. Nine healthy people slept for four hours instead of their usual seven and a half, for one night. The next day, their bodies were about a quarter less sensitive to insulin.
One night. The Sleep-Immune Connection: What One Sleepless Night Does to Your Defences has what the same night does to the cells that fight infection, and how quickly they recover.
A lie-in does not settle the account. Healthy young adults slept five hours a night through a working week, then slept as long as they liked for two days, then went back to short nights. Back on short nights, their bodies were 9 to 27% less sensitive to insulin than at the start, and they ate more after dinner and put on weight. You cannot bank sleep like money.
The account pays back as well. 42 healthy adults who slept less than seven hours a night were split in two, and one half was helped to sleep longer for four weeks. They gained about 21 minutes of sleep a night, and ate about 10 grams less free sugar a day than the half who carried on as before. It was a small first test. Twenty minutes more in bed, ten grams less sugar: it may be the laziest sugar cut there is. If light wakes you early, a keeps the room dark for the extra minutes.
The promise in the first paragraph, to get to bed on time, is not the small one on the list.
Two weeks on the sofa
Ten healthy young men, who walked about 10,500 steps a day, cut it to about 1,350 for two weeks. That is the difference between an ordinary day and one spent mostly sitting. A tells you which side of that line you are on.
By the end, their bodies were 17% less sensitive to insulin, their fitness had fallen by 7%, and the muscle in their legs had shrunk. They were young and healthy, and it took a fortnight. Their muscles had not been told it was temporary.
Older bodies lose ground faster. The Harsh Truth About Aging: Decline or Longevity? has what two weeks of fewer steps did to adults of about 72, and Defy Aging with Movement, linked below, has what three weeks in bed did to five men of twenty.
Two weeks is two rounds of "next week".
Stop something
The body answers just as fast when you stop something. 94 healthy people who drank on average about 32 units a week stopped for a month, and 47 who carried on drinking were measured alongside them. In the month without alcohol, insulin resistance fell by about a quarter, blood pressure by about 6% and weight by 1.5%. In the drinkers, nothing changed.
They chose their own group, and people ready to stop may differ from people who are not. Still: one month.
One evening shows it too. 4,098 Finnish employees wore heart monitors through nights with and without alcohol. In the first hours of sleep, the body's recovery fell by about 9 percentage points after a little alcohol, 24 after a moderate amount and 39 after a lot. Being young or active did not protect them.
Sugar answers faster. 43 children with obesity had the sugar in their diet cut from 28% of their calories to 10%, with starch put in its place so the calories stayed the same. In nine days, their triglycerides, a fat in the blood, fell by 46%, the lower figure of their blood pressure by 5 points, and their bodies handled sugar better. They were children, and the starch stayed on the plate. This site would take that out as well.
The long delay
Waiting also has a price on the scale of decades, and smoking shows it most plainly. Stopping between 35 and 44 bought about nine years of life over carrying on. Stopping between 45 and 54 bought about six. The ten years between those two starts cost about three years of life. Your Genes Aren't Your Destiny: How Much of Your Health Is Up to You has the figures.
The other side is just as true: it is never too late to start. People who had been inactive for most of their adult lives and took up activity between 40 and 61 had 35% fewer deaths than those who stayed inactive, nearly the same as the lifelong active, at 36%. Defy Aging with Movement, linked below, has the rest of that count.
Strength in midlife, freedom at seventy
6,089 healthy men aged 45 to 68 in Honolulu had the strength of their grip measured in the late 1960s. Twenty-five years later, the survivors were checked again. The weakest third at the start had nearly three times the odds of walking at a crawl, 0.4 metres a second or slower, and more than twice the risk of needing help to wash and dress.
Seventy comes in two versions. In one, you climb the stairs without losing your breath, carry the shopping, get down on the floor with your grandchildren and back up, and travel without a stick. In the other, you avoid the stairs, lean on the trolley, watch the grandchildren from a chair, and stay home because moving hurts. Nobody chooses the second one. They just keep postponing the first.
What you do in your forties, fifties and sixties has a large say in which one you get.
Try the test now: sit in a chair, then stand up without using your hands, five times, as fast as you safely can. The ageing article above has the time that counts as low strength, and more checks to do at home.
Tired, or spent?
Physical exhaustion needs rest: muscles worn out from work, a brain drained by hard thinking. The other kind of tiredness comes from underuse, and rest makes it worse.
If you are "too tired" to walk but can scroll your phone for half an hour, or watch television for two hours, it is the second kind. The cure is movement, not more sofa. The sofa is a poor charger.
5 Ways to Harness Your Energy and Beat the Afternoon Slump has the tests: a brisk ten-minute walk left people more energetic for two hours than a sugary snack bar did, and ten minutes of easy stair walking did more for short-slept young women than a caffeine pill. Coffee only masks the tiredness. The walk deals with it.
If you are tired whatever you do, look for a cause. Why Am I Always Tired: When Chronic Exhaustion Has a Cause That Sleep Can't Fix goes through nine of them.
Make the first win small
Your brain files "getting healthy" according to past attempts. Each abandoned diet and skipped workout adds to the file marked "things I'm bad at". What changes the file is a win, and the size of the win matters less than having it.
So make it one you will get. Jumping from two glasses of water a day to eight sets you up to fail. Jumping to three is a success, and it makes four look possible. A turns each glass into a line you can see yourself pass.
Small works for fitness too. Sedentary young adults climbed three flights of stairs hard, three times a day with hours in between, three days a week, for six weeks. Their fitness rose against a group that did nothing. The rise was modest, and it came sixty steps at a time.
Borrow a habit that already works. You brush your teeth every day without thinking about it; add thirty seconds of stretching straight after. Why Motivation Fails — and What Keeps Habits Going After It Does has why tying a new habit to an old one helps it stick.
Then give yourself proof. Rate your energy from 1 to 10 in the morning, the early afternoon and the early evening for three days, changing nothing. Then do three more days with one ten-minute walk added, and compare. It is a test of one, and it is yours.
One trick to skip is switching your toothbrush to your weaker hand to "train" your willpower. Across 33 tests of self-control training, the effect was small, smaller still once unpublished results were allowed for, and no one could say how it worked.
Bring someone
166 people joining a weight-loss programme were recruited either alone or with three friends or relatives, then given either the standard programme or the same with help on supporting each other. Of those who came alone and got the standard programme, 76% finished, and 24% kept all their lost weight off over the next six months. Of those who came with friends and got the support, 95% finished, and 66% kept it all off. Friends plus support nearly tripled the share who kept it off. That is a better return than most gym kit.
Help works best when you ask for something specific. "I want to get healthy" gives nobody a job. "I'm starting walks after dinner and would love company twice a week" does.
Why "Monday" keeps winning
The promise to start on Monday is more than an excuse. People are more likely to begin something new just after a landmark: a new week, a new month, a birthday. The trouble is the wait for it, and the body's short accounts are why the wait costs. Why Your Brain Sabotages You Every Time You Try to Start, linked below, has why starting feels so much worse than it is, and how to make it feel smaller.
Start imperfect
The best time to start taking care of yourself was ten years ago. The second-best time is today.
Your circumstances will never be ideal. There will always be stress, too little time and something else that needs doing. Start with the life you have. Only have 15 minutes? Work with 15 minutes. Only have basic equipment? Work with basic equipment. Only able to make a small change? Make a small change.
And a missed day costs little. In 96 volunteers building a daily habit, missing one opportunity "did not materially affect the habit formation process". What counts is the next day, and the habits article above has the rest.
None of it needs a programme. When Kenneth Cooper coined the word "aerobics" in 1966, what he sold with it two years later was a points system, not a class.
If you need a push, Mel Robbins' "5 second rule" is a fair one: decide, then move within five seconds, before the excuses arrive. It comes from her 2011 talk and her 2017 book. Treat it as a trick, not a finding.
Your next ten minutes
Close this article and do one thing now. Not tomorrow. Not "on Monday".
Put on your shoes and walk for ten minutes, with no route and no goal. Or drink a full glass of water. Or do ten push-ups against a wall or the kitchen counter, counting them out loud. Or stand up from your chair without your hands, five times. Or set your bedtime alarm half an hour earlier for tonight.
One action tends to lead to the next. Walk to the kitchen for water and you will probably stretch while you are there. Put on your walking shoes and you will probably step outside.
Tomorrow's version of you has been promised a lot. Give them something today.
Pick one, and do it before you check your messages.
Still putting it off? Why Your Brain Sabotages You Every Time You Try to Start — why starting feels worse than it is, and eight ways to make it smaller.
Want to know what the movement buys you? Defy Aging with Movement: How Exercise Keeps You Strong, Sharp, and Independent for Life — three weeks in bed against thirty years, and ten things exercise does for an ageing body.
Know someone who keeps promising to start next week? Send them this, and walk the ten minutes with them.
Disclaimer: This article is general information. For advice about your own health, talk to a qualified health professional. If you drink heavily every day, stopping suddenly can be dangerous, so get help to cut down.
Affiliate Disclosure: This article contains affiliate links. As an Amazon Associate, All For Life earns from qualifying purchases, at no extra cost to you. We only link to products we would recommend without the commission.
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