sleep
Chamomile tea for sleep: small effect, real ritual
Chamomile tea for sleep produces modest improvements in sleep quality in trials, mostly in postpartum women and older adults. The bedtime routine may matter as much as the apigenin.
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sleep
Natural sleep aids ranked by how much evidence they have
The natural sleep aid with real evidence is CBT-I, followed by light exposure and a fixed schedule. Melatonin shifts timing more than it deepens sleep, and most herbal aids sit close to placebo.
sleep
How much deep sleep do you need?
How much deep sleep do you need? Most healthy adults spend 13 to 23% of the night in slow-wave sleep, roughly 60 to 110 minutes. It falls with age, and chasing a wearable number is usually counterproductive.
sleep
Is 6 hours of sleep enough?
Is 6 hours of sleep enough? For roughly 99% of adults, no. Performance keeps degrading on six hours while subjective sleepiness plateaus, which is why short sleepers feel fine and test badly.
sleep
What is sleep paralysis, and why does it feel so real?
What is sleep paralysis? The muscle atonia of REM sleep persisting a few seconds into waking. It is harmless, common, and strongly linked to irregular schedules and sleep deprivation.
supplements
What does creatine do in your body?
What does creatine do? It recycles ATP during short, hard efforts. That single mechanism explains the strength gains, the water weight and the cognitive findings under sleep loss.
supplements
When to take creatine: timing, loading and cycling
When to take creatine matters less than taking it daily. Post-workout has a slight edge in a few trials, loading only shortens the wait to saturation, and cycling has no evidence behind it.
supplements
Does creatine make you gain weight? What that weight is
Does creatine make you gain weight? Yes, 1 to 2 kg in the first weeks. It is water pulled inside muscle cells, not fat, and it is part of how creatine works.
supplements
Does creatine cause hair loss? The claim traced to one study
Does creatine cause hair loss? The claim traces to one 2009 study in 20 rugby players that measured a rise in DHT. No trial since has measured hair loss as an outcome, and none has replicated it.
hormones
Supplements to reduce cortisol: what holds up
Among supplements to reduce cortisol, ashwagandha has the most trial support and phosphatidylserine some; most of the rest rest on animal work. Behaviour still moves cortisol more than any capsule.
hormones
Cortisol test explained: blood, saliva and urine
A cortisol test means little without the clock: cortisol swings hour to hour, so a single blood draw is nearly meaningless on its own. Here is which test, blood, saliva or urine, answers which question.
hormones
How to increase testosterone naturally, ranked by evidence
How to increase testosterone, ranked by evidence: fix sleep, lose excess fat, lift weights. Most testosterone-boosting supplements do nothing unless you are deficient in the underlying nutrient.
hormones
Symptoms for low testosterone in men, and their other causes
The core symptoms for low testosterone in men are fatigue, low libido and lost morning erections. Sleep apnea, depression and thyroid disease produce the same picture and are more common.
movement
Heart rate zones explained without the formula worship
Heart rate zones are built on a 220-minus-age estimate that is off by up to 20 beats for many people. Talk tests and perceived effort are more useful than a number your watch guessed.
movement
Body weight squats: form, progressions and rep counts
Body weight squats reward depth and control over repetitions. Once 20 clean reps feel easy, the useful move is a harder variation, not a higher number.
movement
Exercises for tricep muscles that train all three heads
The best exercises for tricep muscles cover all three heads: overhead extensions for the long head, pushdowns for the lateral, close-grip presses for the medial. Most arm routines train half the muscle.
movement
Strength training for runners: the evidence and the dose
Strength training for runners improves running economy by 2 to 8% without adding bulk. Two heavy sessions a week is the dose used in most trials.
weight loss
Exercise bike weight loss: the honest arithmetic
Exercise bike weight loss runs on arithmetic: a moderate hour burns 400 to 600 kcal, which one large muffin erases. Cycling works for fat loss when paired with a diet that accounts for it.
longevity
VO2 max chart by age: where you sit and what it means
A VO2 max chart shows normative ranges by age and sex. What matters more is which direction yours is moving, because cardiorespiratory fitness responds to training at any age.
longevity
Fasting for blood work: which tests actually require it
Fasting for blood work is still required for glucose, insulin and some metabolic panels, but increasingly not for lipids. Here is what to fast for, and for how long.
longevity
DEXA scan body fat percentage: how accurate is it really?
A DEXA scan body fat percentage is the practical reference standard, accurate to within about 1 to 3%. Consistency of scan conditions matters more than which scanner you use.
mental health
Panic attack vs anxiety attack: the difference that matters
Panic attack vs anxiety attack: a panic attack is a defined diagnostic event, abrupt, peaking within ten minutes, intensely physical. Anxiety attack is not a clinical term but describes something real and slower.
mental health
Meditation for anxiety: does it work? What trials show
Meditation for anxiety produces moderate reductions in mindfulness-based programmes, and one trial matched an SSRI head to head. The effective dose is larger than an app streak.
mental health
ADHD symptoms in women, and why they get missed
ADHD symptoms in women skew inattentive: distractibility, disorganisation, internal restlessness and emotional dysregulation rather than visible hyperactivity. Masking and male-derived criteria mean many are diagnosed decades late.