Plans for Your Body · Hormones, sleep & ageing
The testosterone plan
Low testosterone is often a symptom. Treat the cause.
The goal: In many men, low testosterone is driven by belly fat, short sleep, sleep apnea, alcohol and inactivity more than by age. Test it properly: morning, and repeated. Then lose the belly fat, sleep 7+ hours, lift, drink little, and retest at 3–6 months. If it’s still low, your doctor needs to find out why.
The usual route: tired, low libido, one afternoon blood test, a borderline number, and a conversation about hormones. Often nobody asks about your waist, your sleep or your snoring, which are frequently what pushed the number down. This plan tests properly, fixes the inputs that suppress testosterone, and leaves the treatment decision where it belongs, with your doctor.
- MeasureTwo morning testosterone tests · SHBG · fasting insulin · HbA1c · waist · sleep apnea screen
- ChangeLose belly fat · lift 2–3×/week · 7+ hours of sleep · little or no alcohol
- RetestAt 3–6 months, same time, same lab. Still low? Your doctor finds out why.
Most men chase the number. This fixes what’s pushing it down.
Not medical advice
Discuss everything here with a medical doctor before acting on it — supplements included. Your doctor has your bloodwork and history. We have neither.
02 Why it matters
The number is a readout, not the problem.
The default
A single afternoon test, read against the wrong range, followed by either “it’s just age” or a prescription. Meanwhile the visceral fat, the short nights and the apnea that suppressed the number keep doing it, and keep raising your risk of diabetes and heart disease.
The better bet
In obese men, losing weight raises testosterone, and the more weight lost, the bigger the rise. In a JAMA study, one week of 5-hour nights cut young men’s daytime testosterone by 10–15%. Fix the inputs and the number often follows.
Knowing what suppresses testosterone tells you where to push.
03 How it works
Your brain sets testosterone. Fat and sleep override it.
The pituitary gland sends a signal (LH) that tells the testes to make testosterone. Excess body fat, insulin resistance, short sleep and alcohol all turn that signal down, or change how much of the testosterone in your blood is usable. That’s why so much low testosterone in middle-aged men is functional: real, but driven by something else.
- Belly fat
- Fat tissue converts testosterone into estrogen, and obesity dampens the brain’s signal to the testes. Low testosterone then makes it easier to gain fat and harder to keep muscle. It runs in a loop.
- Insulin and SHBG
- Most testosterone is bound to a carrier protein, SHBG. Insulin resistance lowers SHBG, so your total testosterone can read low while the usable (free) amount is closer to normal. That’s why one number isn’t enough.
- Sleep
- Testosterone rises during sleep and peaks in the morning. Cut the sleep short and you cut the rise. Matthew Walker devotes a chapter of his book to how short sleep affects men’s hormones.
- Sleep apnea
- Common in men with large necks and waists, and linked to low testosterone. Fragmented sleep and low oxygen suppress the signal. Treat it for your sleep and your heart; how much treatment raises testosterone varies from man to man.
- Muscle
- Muscle is where most of a meal’s glucose goes. More of it means better insulin sensitivity and less fat, and that, not the brief hormone bump after a workout, is how lifting helps testosterone.
- Alcohol
- Heavy drinking lowers testosterone directly. Even moderate evening drinking costs you deep sleep, which costs you testosterone.
- Medications
- Opioids and steroid medications, among others, can suppress testosterone. If you take one, your doctor needs to know you’re checking this; don’t stop anything yourself.
- Age
- Testosterone declines slowly with age. In the European Male Ageing Study, led by Frederick Wu, weight and health mattered more than birthdays: over about four years, men who lost weight saw testosterone rise in proportion, and men who gained saw it fall.
04 The steps
Test properly. Change the inputs. Retest at 3–6 months.
Measure · Weeks 0–4
Get a number you can trust.
- Morning testosteroneask your doctor: before 10 am, twice
Levels are highest in the morning and vary day to day. The Endocrine Society guideline calls for a morning, fasting test, confirmed on a second day. Don’t test after a bad night, a heavy drinking night or while ill.
- SHBG and free testosteroneask for it
If your total is borderline, or you carry belly fat, SHBG lets your doctor estimate the free (usable) testosterone.
- Follow-up testsyour doctor’s call
If it’s confirmed low, your doctor may check LH, FSH and prolactin to see whether the problem is in the testes or the brain. That decides what happens next.
- Fasting insulin and glucosemorning, after an overnight fast
Together they give HOMA-IR, a simple insulin-resistance score. Fasting insulin often isn’t covered in Canada. It’s cheap to pay for.
- HbA1c and waistmetabolic context
Measure your waist at the belly button. Over 102 cm (40 in), or more than half your height, points to the visceral fat that suppresses testosterone.
- STOP-Bangsleep apnea screen
Snoring, Tiredness, Observed pauses, blood Pressure, BMI over 35, Age over 50, Neck over 40 cm, male Gender. Three or more yeses: ask your doctor about a sleep study.
Change the inputs · Months 1–6
Lose the fat. Keep the muscle. Sleep.
- Sugar and refined carbscut hard
Sugar, sweet drinks, juice, white flour and most packaged snacks. The fastest lever on insulin, blood sugar and triglycerides. Lower insulin means less fat storage and, over time, a better SHBG and testosterone picture.
- Real foodprotein first
Build meals on protein, vegetables and natural fats: fish, meat, eggs, dairy, legumes, nuts. Protein and fibre keep you full and flatten glucose spikes. Protein at every meal protects muscle while you lose fat. Phillips’s lab produced much of the evidence on how much protein people who lift need.
- Eating windowdaily, e.g. noon to 8 pm
Eat inside a fixed window and not outside it. Fewer insulin spikes per day, fewer chances to overeat.
- Trainingstrength 2–3×/week, cardio 150+ min/week
Lift, and walk briskly or cycle most days. Muscle is where most of a meal’s glucose ends up, so more muscle means more room for it. Cardio makes that muscle more sensitive to insulin. Lift first: compound movements (squat, hinge, push, pull), 2–3 times a week, adding weight or reps as you get stronger. Muscle is what keeps the fat off.
- Sleep7+ hours
One short night measurably worsens insulin sensitivity, blood sugar and appetite the next day. The cheapest part of the protocol, and the most skipped. For testosterone, the morning hours matter most. Sleeping 5 hours instead of 8 cuts the overnight rise short.
- Alcoholnone while fixing the numbers
It goes straight to the liver, raises triglycerides and adds to liver fat. Less is better; none is best while you’re fixing the numbers. Heavy drinking suppresses testosterone directly; any evening drinking fragments the sleep that produces it.
- Don’t overdo iteat enough, recover
Very high training volume combined with eating too little can push testosterone down. Lose fat steadily, not by starving.
Hands off the hormones
Don’t buy testosterone, prohormones or “boosters” online. Testosterone therapy is a medical decision with real trade-offs, including shutting down sperm production. If you’re already on it, don’t change anything without your doctor.
Supplements · only to fix a confirmed deficiency
Fix deficiencies. Ignore boosters.
- Vitamin D and zinconly if a test shows you’re low
Correcting a real deficiency is reasonable; topping up a normal level hasn’t been shown to raise testosterone. Discuss testing and doses with your doctor first.
- “Testosterone boosters”skip
Most are blends of herbs and minerals with little or no trial evidence for raising testosterone in healthy men. The money is better spent on a sleep study or a gym membership.
Retest · Months 3–6
Same conditions. Compare.
- Same test, same waymorning, same lab
Repeat testosterone and SHBG under the same conditions as before, plus fasting insulin and HbA1c. Re-measure your waist.
- If it rosekeep going
Keep the habits. Testosterone often keeps improving as fat comes off and sleep holds. Be patient with free testosterone: in EMAS it moved clearly only in men whose weight changed by 15% or more, while total testosterone moved with smaller changes.
- If it’s still lowyour doctor
Ask your doctor why. A pituitary problem, medication, iron overload or another condition may be behind it. Whether treatment is appropriate, and what it means for fertility, heart and prostate monitoring, is for you and your doctor to decide.
- If the numbers won’t moveyour doctor
Take the before-and-after numbers to your doctor. Whether you need medication is their call. Needing it isn’t failure. Also see your doctor promptly for breast tenderness or swelling, loss of body hair, very small or shrinking testes, or headaches with vision changes.
05 The rules
Short list. No exceptions.
Choose
- Protein and vegetables at every meal
- Lifting 2–3 times a week, and walking most days
- 7–9 hours in bed, same wake time every day
- Morning tests, repeated, before any decision
Avoid
- Alcohol most nights
- Sugar, sweet drinks and white flour
- Online testosterone, prohormones and boosters
- Judging yourself on a single afternoon test
Non-negotiables
- Get tested properly: morning, and confirmed on a second day.
- Screen for sleep apnea if you snore.
- Talk to a medical doctor before starting any supplement.
- Treatment decisions, including testosterone therapy, belong to you and your doctor.
06 Checkpoints
What to track, and what good looks like.
Labs use different ranges and units, and your doctor interprets the result alongside your symptoms. These are the reference points the main guidelines use.
| What | Target | How and when |
|---|---|---|
| Morning total testosterone | Above ~9.2–10.4 nmol/L (264–300 ng/dL) | Morning, fasting, on two days. The Endocrine Society uses about 264 ng/dL as the lower limit; the AUA uses 300. |
| Free testosterone | Within your lab’s range | Calculated from total testosterone and SHBG. Matters most when SHBG is low or high. |
| Waist | <102 cm (40 in), and under half your height | At the belly button, monthly. Usually moves before the lab number does. |
| HOMA-IR | Under ~1.0 is ideal; over ~2.5 suggests insulin resistance | Fasting glucose (mmol/L) × fasting insulin (µU/mL) ÷ 22.5. |
| HbA1c | <6.0% (Canada) · <5.7% (US) | At baseline and retest. |
| Sleep | 7+ hours, most nights | Sleep diary for two weeks at baseline and retest. |
| Strength | Going up | Log your main lifts. Rising strength while your waist shrinks means you’re keeping muscle. |
To convert total testosterone, multiply ng/dL by 0.0347 to get nmol/L. Canadian labs usually report nmol/L. Converted values are rounded.
07 Where experts disagree
Where the experts don’t agree.
Nobody serious disputes that obesity, short sleep and apnea lower testosterone, or that a single afternoon test is a poor basis for a decision. The arguments are about who should be treated, and what training does.
Treat the number, or the cause?
Treat the deficiency: Morgentaler
Testosterone deficiency is under-diagnosed and under-treated. Men with symptoms and low levels can benefit substantially from treatment, and fears about it have been overblown.
Treat the cause: Grossmann, Wu (EMAS), Endocrine Society guideline
Much low testosterone in middle-aged men is functional, driven by obesity and illness. Address those first; therapy is for confirmed, consistent deficiency with symptoms. In Wu’s population study of 3,369 men, only a handful of symptoms tracked with low testosterone, the sexual ones most of all, so a low number plus tiredness isn’t a diagnosis.
Our read Fix the inputs first, because that helps either way. If your levels are clearly and repeatedly low with symptoms, the treatment conversation is your doctor’s to have with you.
Does lifting build muscle by raising testosterone?
Gym lore
Heavy compound lifts spike testosterone and growth hormone, and that spike is what builds muscle.
Phillips (West & Phillips)
The short post-workout hormone rise didn’t predict who gained the most muscle or strength. Training and protein do the work; the acute spike is mostly noise.
Our read Lift for the muscle and the insulin sensitivity, not for a hormone spike. The testosterone gain comes indirectly, through less fat.
Is testosterone therapy safe for the heart?
Reassured: TRAVERSE investigators (Lincoff et al.)
In over 5,000 middle-aged and older men with low testosterone and heart risk, therapy didn’t increase major heart attacks or strokes compared with placebo.
Cautious: TOM trial investigators (Basaria et al.), and TRAVERSE’s own fine print
An earlier trial in frail older men was stopped early for cardiovascular events, and TRAVERSE itself found more atrial fibrillation, pulmonary embolism and acute kidney injury on testosterone.
Our read Safer than feared, not risk-free. One more reason it’s a decision for you and your doctor, with monitoring, not something to buy online.
08 Limits
What this plan can’t fix.
Primary hypogonadism
If the testes themselves are damaged, by genetics (such as Klinefelter syndrome), injury, infection, chemotherapy or radiation, lifestyle won’t restore production. That’s medical treatment.
Pituitary and other disease
A pituitary tumour, high prolactin, iron overload or other illness can suppress testosterone. Persistent low levels need a proper workup, not more lifting.
Age
Some decline with age is normal. The plan can take you back toward the level your body would make at a healthy weight with good sleep; it won’t make you 25.
The plan removes what suppresses testosterone. It doesn’t repair broken hardware.
09 Resources
Worth your time.
Identification of late-onset hypogonadism in middle-aged and elderly men
The European Male Ageing Study paper that showed which symptoms actually go with low testosterone, and which don’t.
Why We Sleep
Includes the evidence on how short sleep affects men’s hormones and reproductive health.
Testosterone therapy in men with hypogonadism: an Endocrine Society clinical practice guideline
How doctors are told to diagnose low testosterone: symptoms, plus repeated morning tests.
Canadian 24-Hour Movement Guidelines for Adults
Canada’s baseline: activity, strength training twice a week, 7–9 hours of sleep.
10 Questions
Questions, answered plainly.
How can I raise testosterone naturally?
Lose excess body fat, especially around the waist; sleep 7–9 hours; lift weights 2–3 times a week; drink little alcohol; and get snoring checked for sleep apnea. These address the most common reasons testosterone is low in otherwise healthy men.
When should testosterone be tested?
In the morning, ideally fasting, and repeated on a second day if low. Levels peak in the morning and vary from day to day, so one afternoon result isn’t enough. Ask your doctor to arrange it.
What is a normal testosterone level?
Guidelines use a lower limit of roughly 9.2–10.4 nmol/L (264–300 ng/dL) for morning total testosterone, but your lab’s range and your symptoms matter. In the European Male Ageing Study, the symptoms that best marked true deficiency were sexual: weaker morning erections, low desire and erectile problems together. Your doctor interprets the result.
Does losing weight increase testosterone?
In men with obesity, on average, yes. Studies pooling weight-loss trials found testosterone rose with weight loss, and rose more the more weight was lost. How much yours moves varies, and it won’t fix a problem in the testes or pituitary.
Do testosterone boosters work?
Most have little or no good trial evidence. Correcting a real vitamin D or zinc deficiency is reasonable with your doctor’s guidance; buying a booster blend isn’t.
Should I go on TRT?
That’s a decision for you and your doctor, after repeated morning tests, a look for causes and a frank conversation about benefits, risks and fertility. This plan doesn’t give treatment advice.
11 Sources
Where this comes from.
Experts drawn on
- Stuart Phillips, PhD — Professor of kinesiology, McMaster University. Research on protein, resistance training and muscle.
- Matthew Walker, PhD — Professor of neuroscience and psychology, UC Berkeley. Author of Why We Sleep.
- Shalender Bhasin, MB, BS — Endocrinologist, Brigham and Women’s Hospital and Harvard Medical School. Chaired the Endocrine Society testosterone guideline.
- Frederick Wu — Endocrinologist; professor of medicine and endocrinology, University of Manchester. Led the European Male Ageing Study (EMAS).
- Mathis Grossmann, MD, PhD — Endocrinologist, University of Melbourne. Research on obesity, functional hypogonadism and testosterone.
- Abraham Morgentaler, MD — Urologist, Harvard Medical School. Long-time advocate of treating testosterone deficiency.
Sources
- Testosterone therapy in men with hypogonadism: an Endocrine Society clinical practice guideline. Journal of Clinical Endocrinology & Metabolism, 2018.
- Evaluation and management of testosterone deficiency: AUA guideline. American Urological Association.
- Effect of 1 week of sleep restriction on testosterone levels in young healthy men. JAMA, 2011.
- Body weight loss reverts obesity-associated hypogonadotropic hypogonadism: a systematic review and meta-analysis. European Journal of Endocrinology, 2013.
- Identification of late-onset hypogonadism in middle-aged and elderly men. New England Journal of Medicine, 2010.
- Age-associated changes in hypothalamic-pituitary-testicular function in middle-aged and older men are modified by weight change and lifestyle factors: longitudinal results from the European Male Ageing Study. European Journal of Endocrinology, 2013.
- Cardiovascular safety of testosterone-replacement therapy (TRAVERSE). New England Journal of Medicine, 2023.
- Adverse events associated with testosterone administration. New England Journal of Medicine, 2010.
- Associations of exercise-induced hormone profiles and gains in strength and hypertrophy in a large cohort after weight training. European Journal of Applied Physiology, 2012.
- Recommended amount of sleep for a healthy adult: a joint consensus statement of the AASM and Sleep Research Society. Journal of Clinical Sleep Medicine, 2015.
- Clinical practice guideline for diagnostic testing for adult obstructive sleep apnea. American Academy of Sleep Medicine, 2017.
- STOP-Bang questionnaire. American Thoracic Society.
- Alcohol and sleep I: effects on normal sleep. Alcoholism: Clinical and Experimental Research, 2013.
Not medical advice
Discuss everything here with a medical doctor before acting on it — supplements included. Your doctor has your bloodwork and history. We have neither.