PURPOSE: to evaluate effect of aquatic high intensity resistive training on cardiac function and exercise capacity in patients with chronic heart failure. BACKGROUND: Heart failure (HF) is a rapidly growing public health issue with an estimated prevalence of \>37.7 million individuals globally. HF is a shared chronic phase of cardiac functional impairment secondary to many etiologies, and patients with HF experience numerous symptoms that affect their quality of life, including dyspnea, fatigue, poor exercise tolerance, and fluid retention.