Exercise and Your Heart

Names & Terms You Will Hear

Plain-language meanings for the terms your care team may use.

What Is Exercise and Your Heart?

• Exercise is medicine. Each 10 MET-hours per week of activity cuts heart death risk by about 20 percent. That beats many pills.
• The AHA says: 150 min/week of moderate exercise OR 75 min/week of vigorous exercise. Add strength training 2 days a week for extra protection.
• Aerobic exercise: brisk walking, cycling, swimming, dancing. Anything that raises your heart rate counts.
• Strength training (weights, bands, bodyweight) lowers blood sugar and builds muscle. Aim for 2 sessions a week covering all major muscle groups.
• Stretching and balance work matter most after age 65. They prevent falls and keep you active longer.
• The 10% rule: never raise your weekly exercise total by more than 10 percent at a time. This prevents overuse injuries.
• Always warm up for 5 minutes and cool down for 5 minutes. This is extra important if you have a heart condition. Sudden starts and stops are the riskiest times.
• If you have a heart condition, ask your doctor before starting. This matters most for vigorous activity.

Why It Matters

• Regular exercise lowers resting blood pressure by 5 to 8 mmHg. That is on par with starting a BP pill.
• Aerobic training raises HDL (the good cholesterol). It also lowers blood fats and blood sugar. Three major heart risks — all improved.
• Exercise lowers inflammation in your body. Markers like CRP and IL-6 drop. These same markers drive plaque and heart attacks.
• Regular training slows your resting heart rate. Your heart pumps more blood per beat. Less effort for the same work.
• Exercise grows the heart in a healthy way (athlete's heart). Walls get slightly thicker, chambers enlarge, pumping improves. This is different from the harmful thickening of high BP or HCM.
• Exercise improves artery function. Blood flows more freely. Your heart arteries can widen more when needed.
• Sitting all day is a major heart risk factor. It is almost as harmful as smoking. One gym session cannot undo a full day of sitting.
• The benefits add up. Each extra 10 minutes per day helps. You do not need to run marathons. Steady, moderate activity is the goal.

Risk Factors

Knowing your personal risks helps your care team take extra precautions.

CAD and After a Heart Attack or Stent

• Cardiac rehab is the gold standard. It cuts death risk by about 25%. Ask for a referral before you leave the hospital.
• After a stent (PCI): light walking in 1–2 days. Supervised rehab starts 1–4 weeks later.
• Goal: reach 150 min/week of moderate exercise over 8–12 weeks.
• Avoid hard unsupervised exercise (running, heavy lifting) in the first 4 weeks after a heart event.
• Exercise cuts re-admissions, lifts mood, and improves life quality. All key goals after a heart event.
• More info: go.riasalimd.com/cardiac-rehab-guide | go.riasalimd.com/cad-guide.

Heart Failure: Exercise Helps — It Does Not Harm

• The old 'rest and avoid exertion' advice for heart failure was wrong. Exercise is now a top-level recommendation for stable heart failure.
• The HF-ACTION trial (JAMA 2009) tested 2,331 patients. Exercise training cut death or hospital stays by 11%.
• Start low: walk 10–15 minutes per day. Build to 150 min/week over several months. Supervised cardiac rehab is ideal.
• HFpEF also benefits from exercise. It is one of the few things proven to improve exercise capacity in HFpEF.
• STOP and call us if: shortness of breath at rest, legs more swollen, weight up 2–3 lbs in one day, or near-fainting during exercise.
• More info: go.riasalimd.com/hf-guide.

Special Heart Conditions: Know Your Limits

• Thick heart muscle (HCM): No competitive sport (AHA 2020). Moderate exercise is OK. Avoid sprinting and maximal heavy lifts. ICD patients: the SPORTS trial (NEJM 2023) showed sport may be safe for some — decide with your doctor.
• Long QT syndrome: Hard exercise — especially solo swimming — can trigger a dangerous rhythm in LQTS Type 1. Take beta-blockers as prescribed. Never swim alone.
• AFib: Get the rate or rhythm controlled first. Then exercise is safe. See: go.riasalimd.com/afib-guide.
• After a procedure: Ablation: 1 week rest. Heart attack or stent: 1–2 weeks for walking. Open heart surgery: 6–8 weeks before arm resistance training.
• Strength training tips: Do not hold your breath on heavy lifts. Wall-push or gripping exercises raise BP sharply — use caution if you have severe high BP or a thick heart.
• When to see us first: New chest pain with effort, fainting, or family history of sudden death under age 50 — see us BEFORE starting hard exercise.

Common Misconceptions

Possible Complications

Knowing what can go wrong helps you spot problems early. Most complications are uncommon, especially with treatment.

Trusted Resources

Independent, evidence-based pages we recommend for deeper reading.

• AHA — Physical Activity and Your Heart — American Heart Association's patient guide to exercise, activity levels, and heart health.
• AHA — Cardiac Rehab: What Is It? — Overview of cardiac rehabilitation programs, referrals, and what to expect in a supervised program.
• Cleveland Clinic — Exercise and Heart Disease — Plain-language overview of exercise safety for heart patients.
• Mayo Clinic — Exercise and Heart Disease — Practical guidance on safe exercise with heart disease.
• PAR-Q+ Physical Activity Readiness Questionnaire — Free screening tool to identify who needs a doctor check before starting or increasing exercise. Takes 5 minutes.
• HF-ACTION Trial Summary (JAMA 2009) — Landmark RCT proving exercise training is safe and beneficial in heart failure patients.
• SPORTS Trial — ICD and Competitive Sports (NEJM 2023) — Study showing competitive sports may be acceptable for certain ICD patients with careful evaluation.
• AHA — Understanding Target Heart Rates — Target heart rate calculator and explanation of exercise intensity zones with age-based guidance.
• Cardiac Rehab Guide — go.riasalimd.com/cardiac-rehab-guide — Our companion guide to cardiac rehabilitation: what to expect, how to get a referral, and program benefits.
• CAD Guide — go.riasalimd.com/cad-guide — Our coronary artery disease guide — includes exercise guidance after diagnosis and revascularization.
• HFrEF Guide — go.riasalimd.com/hf-guide — Our heart failure guide — includes exercise prescription and the HF-ACTION evidence in more depth.
• AFib Guide — go.riasalimd.com/afib-guide — Our atrial fibrillation guide — includes guidance on exercise safety with controlled vs. uncontrolled AFib.

Sources Used to Build This Guide

• AHA/ACC 2018 Physical Activity Guidelines for Americans [clinical_guideline] — Primary reference for the 150 min/week aerobic + 2x resistance prescription, target heart rate zones, and intensity definitions.
• HF-ACTION Trial — O'Connor et al., JAMA 2009 [clinical_trial] — Key RCT demonstrating exercise training in HFrEF reduced all-cause mortality/hospitalization by 11% (HR 0.89, 95% CI 0.81–0.99). Primary source for HF exercise benefit.
• AHA/ACC 2020 HCM Guidelines — Ommen et al. [clinical_guideline] — Guidance on exercise restrictions in hypertrophic cardiomyopathy, including competitive sport restriction and recreational exercise allowances.
• SPORTS Trial — Lampert et al., NEJM 2023 [clinical_trial] — Landmark trial showing competitive sports may be acceptable for ICD patients with appropriate evaluation. Used in the structural conditions subsection.
• Gulati HR Formula — Gulati et al., Circulation 2010 [peer_reviewed_article] — More accurate maximum heart rate formula for women: 206.9 − (0.67 × age). Used in the target heart rate section.
• Dose-Response: Physical Activity and Cardiovascular Disease — Samitz et al., European Heart Journal 2011 [meta_analysis] — Meta-analysis demonstrating ~20% reduction in CV mortality per 10 MET-hr/week additional activity. Basis for the dose-response bar chart.
• Physical Activity and Cardiovascular Health — Wen et al., Lancet 2011 [cohort_study] — Large Taiwan cohort showing 15-min/day brisk walking cut mortality by 14%. Supporting evidence for the lower end of the dose-response curve.
• AHA Resistance Training Statement — Williams et al. 2007 [clinical_guideline] — AHA scientific statement on resistance training for cardiac patients: Valsalva avoidance, circuit training preference, isometric caution.
• Long QT Syndrome and Exercise — AHA/ACC Guidelines [clinical_guideline] — Guidance on exercise avoidance in Long QT syndrome, particularly swimming alone and vigorous activity in LQTS type 1.
• Cleveland Clinic — Exercise and Heart Health [patient_education] — Authoritative patient-facing reference reviewed for plain-language framing. This guide adds: quantitative dose-response data, HR-zone table by age, and condition-specific subsections not covered by Cleveland Clinic.
• Mayo Clinic — Exercise and Heart Disease [patient_education] — Competitor baseline reviewed for topic scope. This guide adds: HF-ACTION trial data, HCM/LQTS restrictions, RBA table, and inline matplotlib diagrams not in Mayo's static text.
• PAR-Q+ Physical Activity Readiness Questionnaire [clinical_tool] — Reference for the pre-exercise screening questions. Used in the structural conditions subsection and risk factors.
• Cardiac Rehabilitation Mortality Evidence — Anderson et al., Cochrane Review 2016 [systematic_review] — Cochrane review showing exercise-based cardiac rehabilitation reduces CV mortality by approximately 26% in post-MI patients.