Purpose:
Lack of physical activity after stroke results in increased risk of stroke recurrence and other health problems. While some survivors receive physical therapy (PT), it is often discontinued within a year. Cardiac Rehabilitation (CR) is a community exercise program for people with cardiac dysfunction; however, stroke is not a covered diagnosis despite high cardiovascular risk. CR for stroke survivors is an opportunity to bridge the gap between PT and community physical activity. The study evaluated the impact of CR participation on stroke survivors.
Materials and Methods:
A pilot study was completed at a phase 3 CR facility. Participants were screened for eligibility and entered the CR program (3 x per week for 12 weeks) with an aerobic fitness focus. Individual outcomes were taken pre- and post-program, and 6-months follow up. Program impact was measured by paired t-tests (24 participants) and repeated measures ANOVA (18 participants) for 6-month follow up.
Results:
Twenty-four participants completed the study. Participants were 79% (19/24) male with an average age of 62.2 years old (range 33.5 -81.5) with a time since stroke of 29.7 months (range 3-123). Most participants (20/24) were community ambulators at the start of the study (six-minute walk test (6MWT) > 288 m).
Pre-Post Program:
The six-minute walk test (6MWT) (endurance) improved by 62 ± 66 m (p<0.005). The five times sit to stand test (5xSS) (strength) improved by 3.8 ± 5.8 sec (P=0.004). The Stroke Impact Scale Mobility Subscale improved by 7.3% ± 11.8%, (p=0.006), the Activities of Daily Living Subscale improved by 6.2% ± 9.9%, (p=0.006) and the Memory Subscale by 6.4% ± 14.7%, (p=0.043). Fast Walking Speed, Self-Efficacy and Exercise Outcome Expectation Scales improved with statistical significance but lacked clinical significance. No other outcomes had statistically significant changes.
Six-month Follow up:
At 6-month follow up, 89.5% (16/18) of participants were still exercising at least once a week. The CR program elicited statistically significant participant improvements over time in the 6MWT (p=0.001) and 5xSS (p<0.001). Post-hoc analysis revealed a statistically significant improvement from pre-program to 6-month follow up in 6MWT distance (66.52 ± 53.73m, p=0.013), 5xSS (-3.44 ± 2.20s, p=0.003) but not post-program to 6 months follow up 6MWT (-5.2 ± 26.4m, p=1.00) and 5xSS (-0.24 ± 1.69s, p=1.00) demonstrating maintenance of gains, but no additional gains.
Conclusions:
CR elicited meaningful improvements for stroke survivors (exceeding minimal clinically important differences) in walking endurance, strength, perceived memory and perceived mobility with gains maintained for endurance and strength at 6-month follow up. CR enhances exercise habits and physical activity through structured exercise after discharge from PT and may improve community participation.
Six-minute walk test: An effective and necessary stress test in modern cardiac rehabilitation
