Physical Health Consequences of Obesity: 10 Major System Impacts

Obesity (BMI ≥30) is a chronic, relapsing disease affecting virtually every organ system:

1. Cardiovascular: Hypertension, coronary artery disease, heart failure, stroke, atrial fibrillation—leading cause of mortality.
2. Metabolic: Insulin resistance → type 2 diabetes, dyslipidemia, NAFLD/NASH.
3. Musculoskeletal: Knee/hip osteoarthritis, low back pain, gout, surgical complications.
4. Respiratory: Obstructive sleep apnea (OSA), obesity hypoventilation syndrome (OHS), asthma exacerbation.
5. Hepatic: NAFLD → NASH → cirrhosis → HCC; most common liver disease in Western nations.
6. Cancer: 13+ linked types: postmenopausal breast, colorectal, endometrial, esophageal, renal, pancreatic, hepatic, ovarian, thyroid, multiple myeloma, meningioma.
7. Reproductive: PCOS, infertility, anovulation (women); low testosterone, ED, poor sperm quality (men).
8. Dermatologic: Striae, acanthosis nigricans, intertrigo, hidradenitis suppurativa, impaired wound healing.
9. Functional: Reduced mobility, exercise intolerance, falls, disability, sarcopenic obesity.
10. Systemic: Chronic inflammation (↑ IL-6, TNF-α, CRP), immune dysfunction, ↓ vaccine response, ↑ infection severity, ↓ quality of life, depression, stigma.

Management

Multimodal approach: nutrition (caloric deficit, high protein/fiber), physical activity (150+ min/week + resistance training), behavioral therapy, anti-obesity medications (GLP-1 agonists, etc.), bariatric surgery (BMI ≥40 or ≥35 with comorbidities). 5–10% weight loss yields major metabolic benefit.