Physical activity patterns in normal, overweight and obese individuals using minute-by-minute accelerometry

Area of Science:

• Exercise Physiology
• Obesity Research
• Public Health

Background:

• Obesity is a growing global health concern.
• Understanding physical activity patterns is crucial for developing effective weight management strategies.
• Accelerometry offers objective measurement of daily physical activity.

Purpose of the Study:

• To compare daily physical activity levels between normal-weight, overweight, and obese adults.
• To analyze physical activity patterns using minute-by-minute accelerometry.
• To identify differences in activity across different times of day and days of the week.

Main Methods:

• A cross-sectional study involving 84 adults (36 males, 48 females).
• Participants wore uniaxial accelerometers for 7 consecutive days to collect minute-by-minute activity data.
• Body Mass Index (BMI) was used to categorize participants into normal-weight (BMI<25), overweight (BMI 25-29.9), and obese (BMI>30) groups.

Main Results:

• No significant differences in physical activity were found between normal-weight and overweight participants.
• Obese participants were significantly less active than non-obese participants during weekdays, weekends, and evenings (P<0.001).
• Activity differences between obese and non-obese individuals were more pronounced in males than females, and particularly evident during periods of free choice or inactivity.

Conclusions:

• Obese individuals demonstrate substantially lower physical activity levels compared to their non-obese counterparts.
• The reduced activity in obese individuals, especially during non-structured times, likely contributes to the maintenance or increase of obesity.
• Minute-by-minute accelerometry is a valuable tool for assessing activity patterns and informing interventions for inactivity.