Cardiovascular response during submaximal underwater treadmill exercise in stroke patients

Area of Science:

• Cardiovascular physiology
• Rehabilitation medicine
• Hydrotherapy

Background:

• Stroke survivors often experience impaired mobility and cardiovascular deconditioning.
• Assessing cardiovascular responses to different exercise modalities is crucial for optimizing rehabilitation.
• Head-out water immersion and aquatic exercise present unique physiological challenges and benefits.

Purpose of the Study:

• To compare the cardiovascular responses of stroke patients during head-out water immersion, underwater treadmill gait, and land treadmill gait.
• To evaluate the safety and efficacy of aquatic treadmill exercise for stroke rehabilitation.

Main Methods:

• Ten stroke patients participated in 40-minute sessions of underwater and land treadmill gait.
• Cardiovascular parameters including blood pressure (BP) and heart rate (HR) were monitored.
• Rate pressure product (RPP), an indicator of myocardial oxygen demand, was calculated.

Main Results:

• Water immersion led to a significant decrease in BP and RPP, with no change in HR.
• Both underwater and land treadmill gait increased BP, HR, and RPP.
• Underwater treadmill gait elicited significantly lower increases in BP, HR, and RPP compared to land treadmill gait.

Conclusions:

• Stroke patients exhibit distinct cardiovascular responses to aquatic versus land-based exercise.
• Aquatic treadmill gait appears to reduce the cardiovascular workload, suggesting it may be a safer alternative.
• Underwater treadmill exercise is a promising option for improving cardiovascular fitness and facilitating early ambulation in stroke recovery.