Patients Inclusion Criteria:1) stroke in the course of CAA; 2) the functional state of the patients, which allows independent walking in a place and at a distance; 3) no severe deficits in communication, memory, or understanding what can impede proper measurement performance;  Patients Exclusion Criteria: 1) cause of stroke other than CAA; 2) stroke up to seven weeks after the episode; 3) epilepsy; 4) lack of trunk stability; 5) lack of independent walking; 6) high or very low blood pressure, dizziness, malaise.  Healthy Inclusion Criteria: 1) the control group consisted of healthy subjects with a stable trunk; 2) with independent walking.  Healthy Exclusion Criteria: 1) a history of neurologic or musculoskeletal disorders such as stroke or brain injury or other conditions that could affect their ability to active movement the trunk and the legs; 2) pain, dizziness; 3) permanent use of orthopedic supplies; 4) severe deficits in communication, memory, or understanding what can impede proper measurement performance; 5) high or very low blood pressure, dizziness, malaise.