Effects of Reducing Sedentary Behaviour on Cardiac Structure and Function at Rest and During Exercise: A 6-Month...

Area of Science:

• Cardiology
• Metabolic Syndrome Research
• Exercise Physiology

Background:

• Limited interventional studies exist on sedentary behaviour (SB) and cardiac health.
• Adults with metabolic syndrome often exhibit sedentary lifestyles, impacting cardiovascular well-being.

Purpose of the Study:

• To investigate the effects of reducing SB on cardiac structure and function.
• To assess changes in inactive and sedentary adults diagnosed with metabolic syndrome.

Main Methods:

• A 6-month randomized controlled trial involving 64 adults with metabolic syndrome.
• Intervention group aimed to reduce SB by 1 hour/day; control group maintained usual habits.
• Echocardiography assessed cardiac structure and function at rest and during exercise.

Main Results:

• No significant differences in echocardiographic variables between randomized groups.
• Participants with successful SB reduction showed decreased left ventricular (LV) mass index and end-diastolic diameter.
• LV global longitudinal strain during exercise improved in the less sedentary group.

Conclusions:

• A 6-month intervention to reduce SB did not significantly alter cardiac structure or function overall.
• However, participants who reduced SB and increased light physical activity demonstrated potential cardiac benefits.
• These findings suggest that behavioral changes in SB may influence cardiac health in this population.