Replacing just 30 minutes of daily sitting time with moderate-to-vigorous exercise could significantly reduce the risk of a second heart attack or other cardiovascular events in people who have already had a heart attack, according to research.

Key Findings:

1. Lower Risk of Recurrence:
   • A study published in Circulation (2022) found that replacing 30 minutes of sitting with exercise (like brisk walking, cycling, or swimming) lowered the risk of a second heart attack, stroke, or death by about 30% in heart attack survivors.
2. Even Light Activity Helps:
   • Replacing sitting with light physical activity (such as standing or slow walking) still provided benefits, though not as strong as moderate-to-vigorous exercise.
3. Sedentary Time Matters:
   • Prolonged sitting is linked to increased inflammation, poor blood flow, and higher cholesterol, all of which raise cardiovascular risks.
   • Heart attack survivors who sit for long periods have a higher chance of another event.

Practical Recommendations:

• Aim for at least 30 minutes/day of moderate exercise (e.g., brisk walking, cycling, swimming).
• Break up sitting time with short walks or standing every hour.
• Strength training (2x/week) can also improve heart health.
• Consult a doctor before starting a new exercise routine, especially after a heart attack.

Reference:

https://www.everydayhealth.com/cardiovacular-diseases/walking-instead-of-sitting-can-halve-risk-of-repeat-heart-attack

https://www.medicalnewstoday.com/articles/replacing-30-minutes-sitting-time-with-exercise-may-prevent-second-heart-attack

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