If you are starting cardiac rehab after a heart event, you might worry your weight will hold you back. A new review of 18 studies looked at whether people with obesity or overweight had different results in rehab compared to people with normal weight. The main goal was to see if exercise capacity improved differently. The review found no significant difference in exercise capacity gains between groups. It also found no major differences in changes to BMI, HDL cholesterol, heart rate, or blood pressure. Total cholesterol improved slightly more in non-obese individuals, and triglyceride reduction was greater in people with a normal BMI. The studies included patients undergoing cardiac rehab after cardiac events and surgeries. Safety events were not reported. The review notes high variation across studies and differences in rehab programs, which can limit firm conclusions. So while starting weight did not clearly affect rehab progress, the evidence is not strong enough to make firm claims.
Baseline BMI does not significantly alter exercise capacity or lipid improvements in cardiac rehabilitation patientsObesity does not limit heart rehab exercise gains
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This systematic review and meta-analysis examined the impact of baseline body mass index on outcomes during cardiac rehabilitation programs. The analysis included eighteen studies focusing on patients recovering from cardiac events and surgeries. Researchers compared changes in exercise capacity, body composition, and lipid profiles between participants with different BMI categories, specifically contrasting obese versus non-obese and overweight versus normal weight groups.
The primary finding was that baseline obesity or overweight status did not significantly hinder improvements in exercise capacity or most lipid parameters such as total cholesterol and HDL levels. While resting heart rate and blood pressure showed no significant differences between groups, triglyceride reductions were modestly greater in patients with a normal BMI compared to those who were overweight or obese. Overall, the data suggests that initial weight status does not dictate the magnitude of physiological improvement achievable through standard rehabilitation protocols.
The authors highlight significant limitations, including high heterogeneity across the included studies and substantial variations in cardiac rehabilitation protocols. These inconsistencies prevent drawing firm conclusions about the long-term efficacy of rehabilitation across different weight categories. Consequently, the certainty of the evidence is moderate to low, and the findings should be interpreted with caution when applying them to individual patient care.
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