12-Week Exercise Intervention Improves Short-Term Cardiovascular Markers in Chronic Coronary Syndrome, Lacks Long-Term Impact
Background
Patients with chronic coronary syndrome (CCS) face a high risk of adverse cardiovascular events, making effective secondary prevention crucial. While physical activity is a cornerstone of improving prognosis, current interventions often struggle with long-term adherence and sustained benefits. There's a gap in understanding how short-term exercise programs translate into lasting changes in movement behaviors and key cardiovascular risk factors like cardiorespiratory fitness (VO2peak), cardiometabolic risk (CMR), and neurotrophic factors such as brain-derived neurotrophic factor (BDNF), which are vital for cardiovascular and cognitive health.
Study Design
This study enrolled 35 CCS patients (mean age 69.5 ± 6.4 years, 82.9% men) in a 12-week group-based exercise intervention. Participants attended two 1-hour exercise sessions per week. Data on anthropometrics, blood samples, cardiopulmonary exercise testing (for VO2peak), and 7-day accelerometry (for movement behaviors) were collected at baseline, 3-month (post-intervention), and 12-month follow-up. Absolute changes were analyzed using paired t-tests, and mixed-effects linear regression models investigated associations between movement behaviors and VO2peak, CMR, and BDNF over time. Intra-class correlations estimated within-person variability.
Results
The 12-week exercise intervention yielded significant short-term improvements. From baseline to the 3-month follow-up, light physical activity increased by 23.7 min/d ± 10.9. Concurrently, several cardiovascular risk markers decreased: body mass index (BMI) dropped by -0.3 kg/m2 ± 1.2, glucose levels decreased by -0.8 mmol/L ± 0.3, and diastolic blood pressure (DBP) fell by -2.7 mmHg ± 1.3. These positive changes, however, were not sustained. > At the 12-month follow-up, no significant changes were observed in any measured marker compared to baseline, indicating a lack of long-term effect from the initial 12-week program. Furthermore, regression models revealed no significant associations between habitual movement behaviors and changes in VO2peak, CMR, or BDNF over time. The analysis also highlighted considerable within-person variability in the data, suggesting individual responses to the intervention varied widely.
Key Findings
- Light physical activity increased by 23.7 min/d at 3 months post-intervention.
- BMI decreased by -0.3 kg/m2, glucose by -0.8 mmol/L, and DBP by -2.7 mmHg at 3 months.
- No significant changes in any cardiovascular marker were sustained at the 12-month follow-up.
- No associations found between habitual movement behaviors and
VO2peak,CMR, orBDNFover time.
Why It Matters
This study underscores a critical challenge in exercise interventions for Chronic Coronary Syndrome patients: achieving sustained long-term benefits. Short-term exercise programs, while beneficial initially, may not be sufficient to induce lasting changes in cardiovascular health markers. For peptide users and biohackers, this implies that integrating exercise into a health regimen requires consistent, ongoing effort beyond a fixed-duration program. Clinicians should consider strategies for maintaining patient engagement and adherence to physical activity over extended periods, potentially through personalized, adaptive, or longer-duration interventions. The transient nature of the observed benefits suggests that the 'dose' or 'duration' of exercise needed for sustained impact might be higher or require continuous reinforcement.
chronic coronary syndrome
exercise intervention
cardiovascular health
physical activity
older adults
long-term outcomes