Less Walking and More Screen Time May Impact More Than Weight: What Parents Should Know

Parents today face a challenge that previous generations never experienced: helping children balance physical activity with an increasing amount of screen time. While phones, tablets, computers, and video games have become part of everyday life, new research suggests that these habits may have important effects on children’s health.

A recent study found that early adolescents who spent less time walking and more time using screens had a higher risk of developing obesity. Researchers followed children over time and found that physical activity and sedentary behaviors played a significant role in long-term health outcomes.

Why Movement Matters

Walking is one of the simplest forms of exercise, but it provides numerous benefits for growing children. Regular physical activity helps:

• Maintain a healthy weight

• Improve cardiovascular health

• Support muscle and bone development

• Enhance mood and mental well-being

• Improve sleep quality

• Reduce the risk of chronic diseases later in life

Even small increases in daily movement can have a positive impact on overall health.

The Growing Concern About Screen Time

Screen time itself is not necessarily harmful. Children use digital devices for schoolwork, communication, and entertainment. However, problems arise when screen use replaces physical activity.

Many children spend several hours each day sitting while using phones, tablets, computers, or gaming systems. Extended periods of sitting reduce energy expenditure and may contribute to unhealthy weight gain over time.

Excessive screen time has also been linked to:

• Reduced physical activity

• Poor sleep habits

• Increased snacking

• Higher rates of obesity

• Digital eye strain

• Increased risk of myopia (nearsightedness)

What This Means for Children’s Eye Health

As optometrists, we are particularly concerned about the relationship between screen use and vision development.

Children who spend long hours focusing on screens often experience symptoms such as:

• Eye fatigue

• Blurred vision

• Headaches

• Dry eyes

• Difficulty focusing

Additionally, studies continue to show that increased near work and reduced outdoor activity may contribute to the development and progression of myopia.

Outdoor time provides a unique benefit because children are exposed to natural light while focusing on objects at varying distances. This combination appears to help support healthy visual development.

Encouraging Healthy Habits

Parents do not need to eliminate screens entirely. Instead, focus on creating a healthy balance between screen use and physical activity.

Some simple strategies include:

Encourage Daily Walking

Walking to school, taking family walks after dinner, or simply spending more time outdoors can increase daily activity levels.

Schedule Outdoor Play

Aim for at least one to two hours of outdoor time each day whenever possible. Outdoor activities support both physical and visual health.

Limit Recreational Screen Time

Establish reasonable limits for non-educational screen use, especially before bedtime.

Follow the 20-20-20 Rule

When using digital devices, encourage children to look 20 feet away for 20 seconds every 20 minutes. This helps reduce eye strain.

Lead by Example

Children are more likely to develop healthy habits when they see parents prioritizing physical activity and balanced screen use.

The Bottom Line

Healthy childhood habits can have lasting effects on both overall health and vision. Research continues to show that less physical activity and more screen time are associated with an increased risk of obesity during adolescence.

For eye care professionals, these findings reinforce an important message: encouraging children to spend more time outdoors and less time in front of screens may benefit not only their physical health but also their visual development.

Regular comprehensive eye exams can help detect vision problems early and provide guidance on healthy screen habits. If you have concerns about your child’s vision, screen use, or risk of developing myopia, schedule an eye examination to discuss the best strategies for protecting their long-term eye health.

Sources

Sonia Chopra. “Less walking, more screen time increases obesity risk in early adolescence.” Healio Endocrinology. April 20, 2026.

American Academy of Pediatrics. Media Use Guidelines for Children and Adolescents.

International Myopia Institute. Recommendations on Outdoor Time and Myopia Prevention.

American Optometric Association. Digital Eye Strain and Children’s Vision Resources.