Inspiratory Muscle Training for Chronic Kidney Disease

Inclusion Criteria: * Aged 50 years or older; women must be post-menopausal * Chronic kidney disease stage 3 or 4 (estimated glomerular filtration rate with the 4 CKD-EPI 2021 race-free equation: 20-59 mL/min/1.73m\^2; stable renal function in the past 3 months) * History of inadequately controlled hypertension (systolic blood pressure 120-159 mmHg on two separate days) and on a stable antihypertensive regimen for the past 6 weeks * Weight stable in the prior 3 months (\<2 kg weight change) and willing to remain weight stable throughout the study. Participants using glucagon-like peptide-1 receptor agonists or planning to start them during the study are excluded unless they have achieved weight stability for at least 3 months prior to enrollment. * Ability to provide informed consent Exclusion Criteria: * Patients with advanced chronic kidney disease requiring chronic dialysis * Significant pulmonary disorders including: chronic obstructive pulmonary disease, interstitial lung disease, cystic fibrosis, or uncontrolled asthma * History of spontaneous pneumothorax, collapsed lung due to traumatic injury that has not fully healed, burst eardrum that has not fully healed, or other conditions of the eardrum * Significant co-morbid conditions with a life expectancy of \< 1 year * History of severe congestive heart failure (i.e., ejection fraction \<35%) * History of hospitalization within the last month * Albuminuria (albumin to creatinine ratio \> 2200 mg/g * Current smoker * Immunosuppressant agents taken in the past 12 months. Steroids used for the treatment of gout are acceptable; however, patients should not be using steroids within 2 weeks (or 14 days) prior to the vascular testing (rationale: may confound vascular testing) * Known malignancy * Inability to cooperate with or clinical contraindication for magnetic resonance imaging including: severe claustrophobia, implants, devices, or non-removable body piercings (these individuals can participate in the study but are excluded from the MRI procedure) * Illicit drug use or alcohol dependence/abuse, which in the opinion of the investigators, would prohibit compliance with the study intervention