Objectively Assessed Daily Steps-Not Light Intensity Physical Activity, Moderate-to-Vigorous Physical Activity and...

Area of Science:

• Psychiatry
• Cardiology
• Exercise Physiology

Background:

• Schizophrenia is linked to sedentary lifestyles, low physical activity, and poor cardiorespiratory fitness.
• Poor cardiorespiratory fitness is a significant predictor of cardiovascular disease in the general population.

Purpose of the Study:

• To investigate the relationship between cardiorespiratory fitness and sedentary time in schizophrenia patients.
• To examine associations between cardiorespiratory fitness and different physical activity aspects (steps, light, moderate-to-vigorous).

Main Methods:

• Objective measurement of sedentary time and physical activity using accelerometers in 62 schizophrenia patients.
• Analysis of relations between daily steps, light intensity physical activity, moderate-to-vigorous physical activity, and cardiorespiratory fitness.
• Statistical control for gender, age, sedentary time, light intensity physical activity, and respiratory exchange ratio.

Main Results:

• A significant positive association was found between daily steps and cardiorespiratory fitness.
• Moderate-to-vigorous physical activity was not significantly associated with cardiorespiratory fitness.
• Daily steps contributed to cardiorespiratory fitness independently of sedentary time and light physical activity.

Conclusions:

• The number of daily steps is a key contributor to cardiorespiratory fitness in individuals with schizophrenia.
• Interventions aimed at increasing daily steps may be effective in improving cardiovascular health in this population.
• The lack of association with moderate-to-vigorous physical activity suggests a need for tailored exercise strategies.