Short answer: enhanced athletes need to treat cardiovascular monitoring as part of training, not as a problem to think about after symptoms appear. Supraphysiological anabolic-androgenic steroid (AAS) exposure is associated with higher blood pressure, adverse cholesterol changes, increased haematocrit, impaired vascular function and unfavourable changes in heart structure and function. Risk varies between people and exposure patterns, but a supplement stack cannot make those effects safe.
The practical priorities are straightforward: understand your baseline risk, measure blood pressure correctly, obtain appropriate blood work, tell a clinician what you are using, investigate warning signs, and act when a marker moves in the wrong direction. Nutrition, aerobic fitness, sleep, smoking status and body composition matter. Supplements may have a limited supporting role, but they sit well below reducing harmful exposure and receiving appropriate medical care.
This Australian guide is educational and non-judgemental. It does not provide a steroid cycle, dosing instructions or a way to “manage” unsafe drug use without medical involvement. Its purpose is to help athletes understand cardiovascular risk and ask better questions.
Key takeaway: the most dangerous cardiovascular changes can be silent. Feeling fit, strong or symptom-free does not tell you whether your blood pressure, ApoB, haematocrit or heart structure is healthy.
Table of contents
- What “enhanced athlete” means here
- Why cardiovascular risk deserves priority
- How performance-enhancing drugs can affect the cardiovascular system
- TRT is not the same as a supraphysiological cycle
- A sensible baseline assessment
- Monitoring blood pressure and blood work
- ECG, echocardiography and other cardiac testing
- Symptoms and results that need prompt attention
- Evidence-led risk reduction
- Where supplements may fit
- How to speak with a clinician
- Frequently asked questions
- References
What “enhanced athlete” means here
“Enhanced” is an informal term. In this guide it refers primarily to people using non-prescribed anabolic-androgenic steroids or other performance-enhancing drugs to increase muscle mass, strength, appearance or performance. It may also include people combining prescribed testosterone with additional compounds or using doses above replacement levels.
That is different from medically supervised testosterone replacement therapy (TRT) used to treat a diagnosed condition. The distinction matters because indication, dose, blood concentrations, product quality, monitoring and co-medications can all differ. It is inaccurate to treat every form of testosterone exposure as equivalent, and equally inaccurate to assume that prescribed TRT has no cardiovascular considerations.
The evidence in AAS users has unavoidable limitations. Researchers cannot ethically randomise healthy people to years of high-dose illicit steroid exposure. Much of the literature is observational, and users may combine multiple drugs, under-report exposure, change compounds over time or have different training, diet and stimulant habits. Those limitations reduce precision; they do not make the consistent risk signals disappear.
Why cardiovascular risk deserves priority
Liver health receives plenty of attention in bodybuilding culture because liver enzymes appear on common blood panels and oral compounds are known for hepatotoxicity. Cardiovascular harm can be quieter and more consequential.
Important cardiovascular risk pathways include:
- atherogenic lipids: HDL cholesterol can fall and LDL-containing particles can rise;
- higher blood pressure: through fluid balance, vascular tone, sympathetic activity and other mechanisms;
- erythrocytosis: testosterone can increase red-cell production and haematocrit;
- cardiac remodelling: changes in ventricular wall thickness, mass and function;
- endothelial dysfunction and arterial stiffness;
- pro-thrombotic influences: which may interact with other risk factors; and
- indirect risks: sleep apnoea, kidney stress, insulin resistance, stimulant exposure and rapid weight gain.
A 2017 study of experienced male weightlifters found that long-term AAS users had lower measures of left-ventricular systolic and diastolic function and more coronary plaque than non-users. It was an observational cohort, so it cannot prove every effect was caused by AAS, but the findings are clinically concerning. A 2026 systematic review and meta-analysis of 35 studies reported greater ventricular wall thickness and mass, alongside less favourable measures of cardiac function, in AAS-using resistance athletes compared with non-users.
More recent cohort evidence has also linked AAS exposure with cardiovascular disease. The exact risk for an individual cannot be calculated from a blog article, particularly when products and exposure histories vary. The defensible conclusion is that the risk is real enough to justify prevention, honest disclosure and clinical monitoring.
How performance-enhancing drugs can affect the cardiovascular system
Blood pressure
Blood pressure may rise through sodium and water retention, activation of neurohormonal pathways, increased sympathetic activity, impaired endothelial function, rapid increases in body mass, sleep apnoea and the combined effects of other drugs or stimulants. A 2025 systematic review and meta-analysis reported higher pooled systolic and diastolic blood pressure in AAS-using athletes, although the included studies differed in design and quality.
High blood pressure often causes no symptoms. Headache or flushing are unreliable screening tools. A validated upper-arm monitor and repeated measurements are more useful. Start with blood pressure explained for athletes, use the step-by-step home monitoring guide, and read steroids and blood pressure for the AAS mechanism-focused guide. Repeated high readings are covered separately in high blood pressure in athletes.
Cholesterol, ApoB and atherosclerotic risk
AAS can lower HDL cholesterol and worsen LDL-related markers, particularly with some orally active agents. HDL and LDL cholesterol are useful, but they do not tell the whole story. ApoB estimates the number of atherogenic lipoprotein particles and can add information when triglycerides are elevated or LDL cholesterol appears discordant with other risk factors.
Low HDL is not a problem that can always be “fixed” by finding a supplement that raises the number. The exposure driving the change matters. Learn the foundations in cholesterol explained for athletes, then use steroids and cholesterol for AAS-specific effects and the athlete’s lipid panel for report interpretation.
Haematocrit and blood viscosity
Androgens can stimulate erythropoiesis. Haematocrit therefore deserves monitoring, particularly during prescribed testosterone therapy and any supraphysiological use. Interpretation is not as simple as one isolated number: hydration, altitude, smoking, sleep apnoea, laboratory variation and the wider clinical picture matter.
Do not self-prescribe blood donation as a universal solution. Repeated donation can cause iron deficiency and may conceal the need to address the underlying exposure. A clinician should interpret persistent or substantial elevation.
Heart structure and function
Resistance training itself can produce physiological cardiac adaptation. AAS exposure may add pathological remodelling that is not equivalent to an ordinary “athlete’s heart”. Research has reported increased left-ventricular mass and wall thickness, impaired relaxation, reduced global longitudinal strain and, in some cohorts, lower ejection fraction.
Not every user develops cardiomyopathy, and reversibility after stopping remains variable. Duration of exposure, cumulative dose, blood pressure, genetics, other drugs and existing disease are likely to influence outcome. That uncertainty is a reason for caution, not reassurance.
Rhythm and thrombosis
Case reports and observational studies describe arrhythmias, myocardial infarction and sudden cardiac events in AAS users. Case reports cannot establish incidence, but they align with plausible mechanisms including structural change, fibrosis, blood-pressure elevation, atherosclerosis, endothelial dysfunction and pro-thrombotic effects.
Combining AAS with stimulants, severe dehydration, diuretics or extreme acute exertion may add risk. A supplement does not reliably counteract that combination.
Sleep apnoea, kidney health and metabolic risk
Obstructive sleep apnoea is common in larger athletes and can worsen blood pressure, rhythm risk and daytime fatigue. Loud snoring, witnessed pauses in breathing, morning headaches and excessive sleepiness deserve assessment.
Kidney disease, diabetes and insulin resistance also change cardiovascular risk. Creatinine can be difficult to interpret in muscular people because muscle mass, meat intake and creatine supplementation affect it. A clinician may use cystatin C, urine albumin-to-creatinine ratio and the broader context when kidney function is uncertain.
TRT is not the same as a supraphysiological cycle
Prescribed TRT aims to treat confirmed hypogonadism and generally targets physiological testosterone concentrations with regular monitoring. Non-medical AAS use commonly involves higher exposures, stacking, fluctuating concentrations and additional oral or injectable compounds.
That distinction should not be used to dismiss monitoring during TRT. Testosterone therapy can affect haematocrit, blood pressure, prostate-related markers and other outcomes, and individual cardiovascular risk still matters. People on prescribed TRT should follow the prescriber’s monitoring plan and discuss symptoms or abnormal results rather than copying a bodybuilding protocol.
Someone using prescribed TRT plus additional non-prescribed compounds should tell the clinician. The combined exposure, not the label attached to one prescription, determines the real assessment.
A sensible baseline assessment
The safest baseline is a genuine clinical assessment before exposure, not a panel ordered after several months of use. What is appropriate varies by age, history and symptoms, but useful areas to discuss include:
History and examination
- personal history of high blood pressure, high cholesterol, diabetes, kidney disease, blood clots or heart disease;
- family history of premature cardiovascular disease, sudden unexplained death, cardiomyopathy or inherited lipid disorders;
- chest discomfort, fainting, palpitations, unusual breathlessness or reduced exercise tolerance;
- smoking, alcohol, stimulant and recreational-drug use;
- sleep quality and possible sleep apnoea;
- all prescription medicines, supplements and performance-enhancing drugs; and
- blood pressure, pulse and an appropriate physical examination.
Blood tests commonly considered
| Area | Examples | Why it matters |
|---|---|---|
| Blood count | Haemoglobin, haematocrit, red-cell indices, platelets | Identifies erythrocytosis, anaemia and other abnormalities |
| Lipids | Total cholesterol, LDL-C, HDL-C, triglycerides, non-HDL-C; ApoB where appropriate | Tracks atherogenic risk and steroid-related lipid changes |
| Glucose | Fasting glucose and/or HbA1c | Assesses diabetes and metabolic risk |
| Kidney | Creatinine/eGFR, electrolytes, urine albumin-to-creatinine ratio; cystatin C in selected cases | Provides context for kidney and blood-pressure risk |
| Liver | ALT, AST, GGT, ALP, bilirubin | Assesses liver-related effects; hard training can complicate ALT/AST interpretation |
| Hormonal | Tests chosen according to therapy, symptoms and clinical question | Should be directed by the actual indication and exposure |
Lipoprotein(a), or Lp(a), is largely genetically determined and is often measured once to refine lifetime cardiovascular risk. High-sensitivity C-reactive protein (hs-CRP) can add context in selected risk assessments, but hard training, infection and injury can temporarily raise it.
See What blood tests should enhanced athletes get? for a longer explanation. A list cannot replace interpretation; trend, timing, symptoms and pre-test conditions matter.
Monitoring blood pressure and blood work
How to measure home blood pressure
- Use a validated automatic upper-arm device with the correct cuff size.
- Avoid exercise, caffeine, nicotine and a large meal for at least 30 minutes beforehand.
- Empty your bladder, sit quietly for five minutes, keep your back supported and place both feet on the floor.
- Support the arm at heart level and do not talk during the reading.
- Take two readings about one minute apart, morning and evening, across several days when establishing a pattern.
- Record the values rather than relying on memory or one unusually good reading.
Australian thresholds and treatment decisions depend on how and where blood pressure is measured, the person’s overall risk and current guidelines. Use Healthdirect’s Australian blood-pressure information as a public starting point, then discuss repeated abnormal readings with a clinician.
How often should blood work be repeated?
There is no universal safe schedule for non-medical AAS use. Timing should reflect baseline risk, the medicines or drugs involved, recent changes and previous abnormalities. A clinician familiar with the complete exposure can set a plan.
Testing only after a cycle can miss a dangerous change while exposure is ongoing. Testing too soon after a hard session can also confuse interpretation of creatine kinase, AST, ALT and inflammatory markers. Consistent pre-test conditions make trends more useful.
ECG, echocardiography and other cardiac testing
Not every healthy athlete needs every cardiac test. Testing should be guided by symptoms, family history, examination, exposure history and clinician judgement.
- Electrocardiogram (ECG): assesses rhythm and electrical patterns. Athletic adaptation can produce findings that need sports-cardiology expertise.
- Echocardiogram: assesses chamber dimensions, wall thickness, valves and aspects of systolic and diastolic function.
- Ambulatory rhythm monitoring: can investigate intermittent palpitations, fainting or suspected arrhythmia.
- Ambulatory blood-pressure monitoring: helps identify sustained, white-coat or masked hypertension.
- Cardiac MRI or coronary imaging: may be used for specific clinical questions, not as casual screening ordered from a checklist.
A normal test is not a permanent clearance certificate. Risk changes with age, symptoms, exposure and time.
Symptoms and results that need prompt attention
Seek urgent medical help for chest pain or pressure, severe breathlessness, fainting during exercise, new neurological symptoms, or a sustained rapid or irregular heartbeat accompanied by weakness, pain or breathlessness. Call Triple Zero (000) for a suspected emergency.
Prompt clinical review is also appropriate for:
- repeatedly high home blood-pressure readings;
- a substantial rise in haematocrit;
- markedly abnormal LDL-C, non-HDL-C, ApoB or triglycerides;
- new exercise intolerance or a clear drop in performance without explanation;
- persistent ankle swelling, breathlessness lying flat or waking short of breath;
- recurrent palpitations, dizziness or near-fainting; and
- a strong family history combined with concerning symptoms.
Evidence-led risk reduction
The highest-impact measure is to avoid non-medical supraphysiological AAS exposure. For a current user, reducing or stopping exposure and obtaining medical support is more important than adding another supplement.
Control the major modifiable risks
- Blood pressure: measure it correctly and act on persistent elevation.
- Atherogenic lipids: review diet, exposure and overall risk; use prescribed treatment when indicated.
- Smoking and vaping: nicotine and tobacco add cardiovascular strain.
- Aerobic fitness: include sustainable cardiorespiratory training rather than relying on resistance training alone.
- Sleep: investigate possible sleep apnoea, especially with snoring, large neck circumference or daytime sleepiness.
- Body composition: rapid or excessive mass gain can worsen blood pressure and sleep-disordered breathing.
- Stimulants: consider total exposure across pre-workouts, caffeine, prescribed stimulants and recreational drugs.
- Alcohol and recreational drugs: avoid compounding cardiovascular and liver risk.
Do not chase one marker in isolation
Raising HDL with a supplement does not guarantee reduced risk. Lowering one home blood-pressure reading does not resolve persistent hypertension. Donating blood does not address every cause of high haematocrit. A coherent risk plan looks at the exposure and the full pattern.
Where supplements may fit
A supplement can be reasonable when it addresses a documented deficiency, improves dietary adequacy or has a defined adjunctive purpose discussed with a clinician. It cannot provide “cycle insurance”.
| Ingredient or strategy | Possible role | Important limitation |
|---|---|---|
| CoQ10 | Energy metabolism; possible small systolic-BP effect in pooled trials | Not proven to prevent steroid-related cardiac harm |
| Citrus bergamot | Promising short-term lipid-marker data | Heterogeneous extracts; not a replacement for lipid treatment |
| Soluble fibre / plant sterols | Modest LDL support within an overall diet | Does not neutralise AAS exposure |
| Omega-3 | Triglyceride lowering in an appropriate clinical context | Dose and product type matter; anti-doping and interaction checks still apply |
| Vitamin D | Correcting deficiency | Extra vitamin D is not proven general cardiovascular protection |
| Curcumin | Possible effects on selected inflammatory or endothelial markers | No evidence that it prevents AAS-associated cardiovascular events |
The Best Heart Support Supplements Australia guide compares these ingredients in depth. FITCNT Heart Support contains CoQ10, citrus bergamot, pantethine, curcumin, vitamins D3 and K2, apigenin and BioPerine. It should be described as nutritional support with mixed evidence levels, not as treatment or protection from PED-related harm.
How to speak with a clinician
Many athletes hide non-prescribed drug use because they expect judgement. Incomplete information makes safe interpretation harder. A practical opening is:
“I use performance-enhancing drugs and I want an honest cardiovascular assessment. I understand you cannot make this safe. I want to disclose the full exposure, review my blood pressure and blood work, and understand which symptoms or results need action.”
Bring a written list of compounds, approximate exposure, dates, prescription medicines, supplements and stimulant use. Include actual home blood-pressure readings. Ask how training should be adjusted before testing and when results should be repeated.
A clinician may advise stopping exposure. That is not a failure of harm reduction; it is a medically relevant recommendation based on the risk.
Frequently asked questions
Can you be healthy while using steroids?
Some users have normal measurements at a particular point in time, but that does not make supraphysiological AAS exposure safe. Risk depends on cumulative exposure, individual susceptibility, co-drugs and existing factors, and some important changes are silent.
What is the biggest heart risk for enhanced athletes?
There is no single risk for everyone. High blood pressure, adverse ApoB-containing lipoproteins, erythrocytosis, cardiac remodelling, arrhythmia risk and atherosclerosis can overlap. That is why a complete assessment is more useful than focusing only on HDL or one supplement.
How often should enhanced athletes check blood pressure?
Regular home measurements are useful because high blood pressure may be symptom-free. The appropriate frequency depends on baseline readings, changes in exposure and clinical advice. Use a validated upper-arm monitor and assess a multi-day pattern rather than one reading.
Which blood tests matter most?
A complete blood count, lipid panel, glucose assessment, kidney markers, liver tests and context-specific hormonal tests are commonly discussed. ApoB, Lp(a), urine albumin and other tests may add value depending on the individual. A clinician should select and interpret the panel.
Does cardio protect the heart during a steroid cycle?
Aerobic fitness is beneficial, but it does not cancel AAS-related changes in blood pressure, lipids, haematocrit or heart structure. Cardio is one part of risk reduction, not protective armour.
Can CoQ10 protect the heart from steroids?
No human evidence shows that CoQ10 prevents AAS-associated cardiomyopathy or cardiovascular events. It has biological roles in energy metabolism and may modestly affect selected markers, but it should not be marketed as steroid protection.
Is prescribed TRT safe for the heart?
Prescribed TRT is different from supraphysiological AAS use, but it still requires an appropriate indication, physiological targets and monitoring. Individual cardiovascular history, haematocrit, symptoms and clinician guidance matter.
When should an athlete get an echocardiogram?
An echocardiogram may be appropriate when symptoms, examination, family history, ECG findings or exposure history raise concern. Routine imaging decisions should be made with a clinician, ideally one experienced in sports cardiology.
Will heart markers return to normal after stopping AAS?
Blood pressure and lipid changes may improve after exposure ends, but recovery is not guaranteed or identical for every marker. Cardiac dysfunction may partially or completely improve in some people and persist in others. Follow-up testing is needed.
References and further reading
- Cavalcante DN, et al. AAS and cardiac structure and function in resistance-trained athletes: systematic review and meta-analysis. 2026.
- Windfeld-Mathiasen J, et al. Cardiovascular disease in anabolic-androgenic steroid users. Circulation. 2025.
- Adverse effects of AAS abuse in athletes and physically active individuals: systematic review and meta-analysis. 2025.
- Baggish AL, et al. Cardiovascular toxicity of illicit anabolic-androgenic steroid use. Circulation. 2017.
- Fadah K, et al. Anabolic-androgenic steroids and cardiomyopathy: an update. 2023.
- Liu JD, Wu YQ. Anabolic-androgenic steroids and cardiovascular risk. 2019.
- Berge HM, et al. Blood pressure and hypertension in athletes: systematic review. 2015.
- Healthdirect Australia. What is a healthy blood pressure?
- National Heart Foundation of Australia. High blood cholesterol.
- Sport Integrity Australia. Supplements in sport.
This article provides general education and harm-minimisation information. It is not medical advice and does not make non-medical drug use safe. Seek professional care for individual assessment. Call Triple Zero (000) for symptoms that may represent a medical emergency.