Related Experiment Video
Updated: Apr 30, 2026

Visualization of Intensity Levels to Reduce the Gap Between Self-Reported and Directly Measured Physical Activity
Published on: March 7, 2019
Do students know the physical activity recommendations for health promotion?
Adilson Marques1, João Martins, Hugo Sarmento
1Interdisciplinary Centre for the Study of Human Performance, Faculty of Human Kinetics, University of Lisbon, Lisbon, Portugal.
Adolescents have low awareness of physical activity guidelines. Improving communication strategies is crucial to ensure young people understand recommended physical activity levels for behavior change.
Area of Science:
- Public Health
- Adolescent Health
- Health Behavior
Background:
- Health decisions rely on knowledge, with physical activity guidelines potentially driving behavior change.
- Understanding recommended physical activity levels is crucial for adolescents' health.
- This study assesses secondary school students' knowledge of physical activity guidelines.
Purpose of the Study:
- To evaluate adolescent knowledge of physical activity guidelines.
- To identify gaps in understanding frequency, duration, and intensity recommendations.
- To inform public health communication strategies for youth.
Main Methods:
- A survey was administered to 2718 adolescents (aged 16-18 years).
- Data collected on self-reported physical activity, gender, and socioeconomic status.
- Chi-square analysis used to assess knowledge of physical activity recommendations.
Main Results:
- Only 16.2% knew physical activity should be daily; 43.5% identified the 60-min duration.
- 62.7% correctly answered the intensity component.
- A mere 3.6% fully understood all physical activity guideline components, irrespective of gender or socioeconomic status.
Conclusions:
- Adolescent comprehension of physical activity guidelines is significantly low.
- Effective communication strategies are needed to disseminate this health information.
- Enhanced awareness can support positive health behavior changes in young people.
Related Concept Videos
Models of Health Promotion and Illness Prevention I
The health belief model (HBM) attempts to predict health-related behavior in specific belief patterns. According to the HBM, a person's...
Levels of Health Promotion and Illness Prevention
In primary prevention, actions taken before disease onset prevent the disease from...
Models of Health Promotion and Illness Prevention II
The agent-host-environment model states that disease results...
Lifestyle Factors and Health
Benefits of Physical Activity
Physical activity, whether through structured exercise or casual activities like walking, biking, or dancing, is a cornerstone of a...
Exercise and Cardiac Output
Sustained exercise increases the muscles' oxygen demand, which can be...
Exercise and Cardiovascular Response
Light to moderate physical activity initiates a series of interconnected responses in the body. The heart rate modestly increases in anticipation of the workout, followed by widespread vasodilation as oxygen consumption by skeletal muscles increases. This results in decreased peripheral resistance, increased capillary blood flow, and accelerated...

