Exercise stress testing in subacute stroke patients using a combined upper- and lower-limb ergometer

Area of Science:

• Neurology
• Cardiology
• Rehabilitation Medicine

Background:

• Stroke survivors often experience residual neurologic deficits impacting functional capacity.
• Assessing cardiopulmonary exercise tolerance is crucial for effective rehabilitation and risk stratification.
• Limited data exists on exercise testing in this specific patient population.

Purpose of the Study:

• To evaluate the safety and efficacy of the Power Trainer, a combined upper- and lower-limb ergometer, for assessing cardiopulmonary exercise tolerance in post-stroke patients.
• To determine the feasibility of using this device for exercise prescription in individuals with neurologic impairments.

Main Methods:

• A prospective, observational study was conducted with 30 subjects undergoing rehabilitation post-stroke.
• Exercise stress testing was performed using the Power Trainer.
• Cardiopulmonary exercise tolerance was assessed by measuring percentage of age-predicted maximal heart rate (APMHR) and rate-pressure product (RPP).

Main Results:

• Thirty subjects successfully completed the stress tests.
• The mean maximum heart rate achieved was 75% of APMHR, with 10 subjects reaching 85% or higher.
• Four subjects experienced transient cardiopulmonary symptoms; exercise prescriptions were generated using the Karvonen formula.

Conclusions:

• The Power Trainer is a safe and effective tool for assessing cardiopulmonary exercise tolerance in select stroke survivors with neurologic deficits.
• The data obtained supports individualized exercise prescription and may aid in investigating coronary artery disease risk in this population.