Insomnia: how CBT-I works, step by step
Sleep tips alone are rarely enough. A fixed wake-up time, a shorter sleep window and a bed that means sleep do the work. How to work out your window, why you feel more tired in the first weeks, and when you need clinical support.
What is rucking? What walking with weight does for you, and what it does not
Ten kilos on your back costs about 9% more energy. An ordinary hill costs more than that with no weight at all. The largest randomised trial of weighted vests found no protective effect on hip bone. How to start light and increase one thing at a time.
What is VO2 max? What your watch's number means and how far to trust it
Your watch does not measure your oxygen uptake. It works backwards from heart rate and pace. Against real maximal tests the error has been large enough to put an individual several METs out, but the same watch looks stable enough to follow your own trend.
Readiness score: what it actually measures
A review of 14 scores across 10 manufacturers found that not one of them discloses its formula. The score is built from four numbers you already have, it looks backwards at the night that ended, and the margin of error is enough to make two devices disagree.
Back, neck and shoulder pain from desk work
The most rigorous review found no association at all between the hours in the chair and low back pain. The neck and shoulders are a different case. What halved the risk in a meta-analysis of 30,850 people was not a belt, an insole or a leaflet. It was exercise.
Snoring or sleep apnoea? How to tell the difference
Snoring is vibration in a narrowed throat. Sleep apnoea is that passage closing, at least ten seconds at a time. You cannot hear the difference but it can be measured, and the combination worth an appointment is snoring plus witnessed pauses plus daytime tiredness.
How long does it take to see results from exercise?
Sleep responds the same day, strength in two to four weeks, fitness in four to eight. But muscle that is genuinely muscle takes closer to ten weeks, because part of what the ultrasound sees earlier is swelling. Which makes the mirror the worst measure you can pick in week five.
The best time of day to exercise: what the research shows
Your body is measurably stronger in the late afternoon. Yet the largest review, 14,125 articles screened, found evidence neither for nor against any particular hour. Why the morning gap can be trained away, and what actually predicts that you keep going.
Chest strap vs wrist heart rate: how accurate is your watch?
Your watch reads heart rate with light, a strap reads it electrically. Against ECG the strap scored 0.996 while the watches ranged from 0.67 to 0.92. Why the error is worst when you grip something, how wide a single reading can miss, and when the wrist is genuinely enough.
Weeknight family dinners: cook one meal, not two
The problem is rarely the recipe. It is that the household cooks two dinners. The NHS says to give your child the same food as the rest of the family, a randomised trial shows what actually makes children like new food, plus the layout that turns one pan into both a kid's plate and an adult's.
Stress and stomach problems: why your gut notices pressure first
Stress does not make your gut sick, but it changes how the gut moves and how much of that you feel. Six routes in, why the field renamed the diagnosis in 2016, what is proven to help, plus the symptoms that need a doctor.
Ice bath after a workout: temperature, time and when it costs you
The protocol everyone repeats, 11 to 15 °C for 11 to 15 minutes, came from nine studies. Seven years later the same research group walked the temperature back after 44 studies. Which dial actually holds up, what the bath costs after strength work, and the one sharp safety line.
Cycling and strength training: the combination that interferes least
The meta-analysis found losses when the endurance work was running, but not when it was cycling. The explanation is in the pedal stroke. The price sits on a different account: 31 studies on cyclists' bone density, what they say, what they do not say about riding to work, and what the counterweight is.
Breathing exercises for stress: what has actually been tested
Every technique pulls the same lever: the exhale. The three exercises the NHS, Sweden's 1177 and a Stanford trial have actually described or tested, the real size of the effect in numbers, the three measures that did not change at all, and the one safety warning that is real.
Shin splints: why the name is not a diagnosis, and what actually gets you back
The running injury with the highest incidence, under a name that covers four different conditions. How to tell it from a stress fracture, why insoles and compression socks are not the treatment, and the graded running programme with its pain rule and its real three to four months.
Stretching before or after a workout: the answer depends on what you want from it
The limit the evidence sets is about how long you hold a stretch, not what time of day you do it. Under 60 seconds per muscle group costs 1.1 per cent, 60 seconds or more costs 4.6. Plus what stretching actually gives you, which is neither fewer injuries nor less soreness.
How long should a nap be, and when should you skip it?
Both nap rules come from one idea: sleep pressure. Why ten minutes beats thirty, why the nine o'clock sofa doze is the most expensive sleep you can take, and why the advice reverses if your nights are already bad.
How to meal prep without eating the same lunch five days running
Meal prep dies on Thursday, in front of the fourth identical box. The base-and-finish method that turns one cook into five lunches, the order to cook in on Sunday, and why cooling decides shelf life more than any number of days.
How to break a bad habit: why willpower is the wrong tool
The habit lives in the situation, not in your character. What collapsed when the largest nudge review was corrected for publication bias, what was left standing, and the roughly three-month window that opens when life changes.
Plantar fasciitis: why the first steps hurt most
The old name points at a bony spur that is rarely the cause. Why the morning step hurts most, the stretch that goes before your foot hits the floor, and why the dose that matters is your whole day rather than your workout.
Rest days between workouts: how often your body can take training
The rule about training each muscle twice a week came from a 2016 meta-analysis. The same researchers walked it back in 2019. What really sets the interval, why tendon runs on a slower clock than muscle, and how to lay out the week.
Achilles tendinopathy: why rest does not fix it
NHS inform says it does not improve with rest, and a randomised trial put wait-and-see at 24 percent recovered against 60 percent for loading. Where the pain sits, how much it may hurt, and the four-stage programme.
Muscle soreness after exercise: why it happens and whether to train
It is not lactic acid, and a 1983 experiment proved it by pulling the two apart. Why soreness is no proof of a good session, what actually relieves it, and the one thing that genuinely prevents it.
How fast do you lose fitness during a break?
Oxygen uptake falls 7 percent in three weeks and then flattens, while strength holds on far longer. Why the first drop is blood volume rather than lost form, plus how little it takes to keep what you built.
Burnout recovery: what actually happens, and how long it takes
Burnout is not a medical condition. Here is the clinical picture behind it, why the crash is the short part and recovery the long one, and what the evidence says about going back to work.
Exercise and sleep: when to train, and what a bad night costs
The advice on evening sessions moved from one hour to four. Why both numbers exist, what a late session does to your overnight heart rate, and whether to train after a bad night.
Normal resting heart rate: what your number means
The 60 to 100 range was set by consensus and never tested. Your watch is not measuring what a clinic measures. How to read your own number instead.
Strength training for runners after 40: the exercises that actually matter
Six exercises in priority order. Why the calf comes before the squat, how heavy to lift, and a two-minute test that shows where you stand.
Runner's knee after 40: which knee pain you actually have
The name is unreliable and gets used for two different problems. Front of the kneecap or outside of the knee decides which triggers you remove first.
What to eat before and after a workout: what actually matters after 40
The 30-minute anabolic window does not exist. But after 40 the conclusion swings partly back: the portion matters more than the clock, for a reason that depends on your age.
Run commuting: how to make it last longer than a fortnight
The big study on active commuting measured cycling and walking, never running. And what stops most people is not the distance but the fact that it is set by the map rather than by their plan.
How to stay motivated to exercise after 40
The 21-day rule came from a plastic surgeon's book, not from research. The real figure is a median of 66 days. And the finding almost nobody quotes: missing one day barely dented the curve.
How many steps a day do you need after 40?
The 10,000-step target came from a Japanese pedometer launched in 1965. The largest review to date lands on 7,000. But the curve only levels off for four of nine outcomes, and that changes what the number means for you.
Strength training and running: how to do both after 40
Does cardio kill your gains? The research is more precise than the reputation: it is running that blunts strength, not the other way round. Which session should come first, three ready-made weekly plans, and what to drop first when time runs short.
How to run a half marathon after 40
A full twelve-week plan from 10K. Why the long run should be counted in minutes rather than kilometres, what you need to eat once a run passes an hour, and why the final two weeks of tapering leave you rested rather than fitter.
Stress management after 40: recovery is what decides
Why it is the absence of pauses rather than the load that makes stress harmful, how it shows up in the body, four levers in the order they work for a week you cannot shrink, and the line at which to get help.
Interval training after 40: how to get the intensity right
Almost everything that goes wrong with speed work goes wrong in the first work interval. How to set the intensity by your breathing instead of your watch, what each session type is for, and an eight-week staircase from hill repeats to four times four minutes.
What is HRV? How to read heart rate variability properly
Why your number cannot be compared to anyone else's or even across two devices, how to build a baseline that means something, and what to actually do on a morning when the number is low.
Sugar cravings at night: why they come and what stops them
The four causes behind the nine o'clock craving, why your environment beats your willpower, how much sugar is actually reasonable and a six-step field manual in the right order.
How to run 10K: the step up from 5K
The ten-week plan that gets you all the way, what the research actually says about how fast you can add distance, how long a 10K takes and why the long run is the whole plan.
How much protein do you need after 40?
What the reference intake actually means, why the number rises with age, how much you need if you strength train, where protein hides in ordinary food and what protein cannot do for you.
Strength training at home without equipment
Why strength falls faster than muscle mass, the only thing that decides whether home training works, six movements that cover the whole body and an eight-week schedule you can start today.
What is zone 2? How to find your easy pace
Why everyone quotes a different number, how to work out your own, why the talk test beats your watch, and when zone 2 means walking.
How to run 5K: the plan that gets you all the way
A complete eight-week plan from a ten-minute jog to the full distance, why you should count minutes rather than kilometres, how long 5K really takes and the five mistakes that stall most people.
Why do I wake up at 3am?
What happens in the second half of the night, the most likely reasons behind your wake-up, what to do while you are lying there, and when to see a doctor.
No time to exercise? Build 150 minutes from the cracks in your week
The guidelines no longer require a long session. How to build the week's minutes out of your commute, micro-bursts and two short bodyweight sessions at home.
How to sleep better after 40: what changes and what actually helps
What happens to deep sleep after 40, the four levers that give you the most back, the truth about caffeine, alcohol and evening training, plus when to see a doctor.
How to start running after 40 without getting injured
An 8-week walk-jog plan, why your tendons set the limit (not your lungs), and the strength work that protects you.