Decreasing screen time and/or increasing exercise only helps in certain situations for young adults

Area of Science:

• Public Health
• Behavioral Science
• Epidemiology

Background:

• Widespread screen-based leisure among youth.
• Inconclusive evidence on screen time and body mass index (BMI) correlation.
• Need to investigate screen time and physical activity in young adults.

Purpose of the Study:

• To examine the relationship between screen time and physical activity/fitness in young adults.
• To determine if increased screen time is associated with higher BMI in this demographic.

Main Methods:

• Online questionnaire distributed via media networks to young adults.
• 262 participants completed the survey; majority resided in Canada, UK, and US.
• Data collected on age, sex, screen time, exercise hours, and Body Mass Index (BMI).

Main Results:

• Young adults exercising <4 hours/week with >5 hours screen time had higher BMI (23.8 vs 21.8).
• No significant BMI correlation with screen time for those exercising >4 hours/week (p=0.62).
• A trend suggested less exercise correlated with higher BMI in high screen time users (>5 hours/day).

Conclusions:

• Reducing screen time and increasing physical activity are beneficial for young adults' health.
• The positive impact of lifestyle changes is more pronounced in sedentary, high-screen-time individuals.
• Findings highlight the importance of balanced lifestyle choices for managing weight and fitness.