This study evaluates the effect of 120 minutes extra of physical education (PE) or physical activity (PA) on adolescents' physical health, mental health, academic performance and learning environment. This is a cluster-randomized controlled trial with three arms, where the participants in two of the groups will have different models of increased PE/PA during the school week, whereas the participants in the third arm is the control group including current practice.
This is a school-based, three-arm cluster randomized controlled trial (RCT) recruiting adolescents from secondary schools in Norway. Adolescents (aged 14-15 years) were the unit of analysis, and schools (clusters) were randomly assigned to one of three conditions: 1. the physical active learning group (PAL-group), where the schools each week include one additional physical education (PE) lesson, 30 minutes of physical active learning, and 30 minutes of physical activity (intervention condition); 2. the don't worry - be happy group (DWBH-group), where the schools include one new activity class (60 minutes: Be Happy class) and one additional PE-class (60 minutes: Don't Worry class) per week (intervention condition);or 3. current practice (control condition). An identical set of outcome measures are taken from all participants at baseline, and approximately 12 months after the baseline measures, when the participants were at the end of year 9
Study Type
INTERVENTIONAL
Allocation
RANDOMIZED
Purpose
PREVENTION
Masking
NONE
Enrollment
2,045
Physical education (60 minutes): In addition to the ordinary PE-lessons. The pedagogical activities taught in this lesson should be in line with the curriculum of 9th grade and led by the PE-teacher. In the Don't worry - be happy intervention this class was also organized by the students. The students practiced their Be Happy-activities, or they introduced their class peers to their "Be Happy"-activity. A PE-teacher was present to support the students if necessary.
The curriculum of the subjects (i.e. maths, English, Norwegian) were taught in a physically active manner. The lesson should last 30 minutes and be led by the teacher of the current subject.
Without a connection to any specific subject "Physical activity" should be performed as 30 minutes a week. There are no specific aims to be taught in this lesson, but physical activities that stimulates mastery, joy and well-being should be in focus.
The Be Happy classes were self-organized activity groups of at least three students, developed according to activity preferences across regular classes. The Be Happy groups practiced traditional sports and physical activities, lifestyle sports, dancing, out-door recreation, drama etc. - inside or outside school.
Norwegian School of Sport Sciences
Oslo, Norway
Mean physical activity level
The participants mean physical activity level measured by accelerometers
Time frame: Measured baseline and after 12 months
Time spent in moderate-to-vigorous physical activity (MVPA)
Mean minutes spent in MVPA per day
Time frame: Measured baseline and after 12 months
Time spent sedentary
Mean minutes spent sedentary each day, measured both objectively using accelerometers
Time frame: Measured baseline and after 12 months
Sedentary behaviour
Self-reported in a questionnaire. There are questions related to minutes spent in front of a screen. The answers are categorized into seven alternatives ranging from "No time at all" to "More than 6 hours per day". There are also questions about which screen activity they perform. The answers are categorized into six alternatives ranging from "No time at all" to "More than 3 hours per day". There are also questions about time spent doing homework. The answers are categorized into nine alternatives ranging from "No time at all" to " More than 7 hours per day".
Time frame: Measured baseline and after 12 months
Upper limb strength
Handgrip strength using a hand dynamometer. The participants will use the dominant hand, with the arm completely extended and squeeze the dynamometer with maximum isometric effort, for about 2-3 seconds.
Time frame: Measured baseline and after 12 months
Explosive strength in the lower body
Standing broad jump. The participants will stand behind a line with feet slightly apart. They will be instructed to perform a two-foot take-off and landing, and to jump as far as possible, landing on both feet without falling backwards. The distance from the take-off line to the nearest point of contact on the landing (back of the heels) will be measured, and the better of two attempts will be used for analyses.
Time frame: Measured baseline and after 12 months
Abdominal muscle endurance
Abdominal muscular endurance will be measured by a sit-up test. The participant will start in a lying position with hands clasped behind the neck, knees bent at a 45° angle with the heels and feet flat on the floor and held down by the tester. The subject then rise to a position with the elbows pointed forward until they touched the knees. The total number of correctly performed and completed sit-ups within 30 seconds is counted.
Time frame: Measured baseline and after 12 months
Cardiorespiratory fitness
Intermittent running test. Participants run for 10 minutes, and the distance covered (in meters) is recorded.
Time frame: Measured baseline and after 12 months
Academic performance in reading
Specific standardized Norwegian National tests in reading.The test is designed and administrated by The Norwegian Directorate for Education and Training.
Time frame: Measured baseline and after 9 months
Academic performance in numeracy
Specific standardized Norwegian National tests in numeracy. The test is designed and administrated by The Norwegian Directorate for Education and Training.
Time frame: Measured baseline and after 9 months
Overall psychosocial problems and strengths
Assessed with the Strength and Difficulties Questionnaire (SDQ). This is a short screening instrument consisting of 25 items equally divided across five scales measuring emotional symptoms, conduct problems, hyperactivity-inattention, peer problems, and prosocial behavior. Each statement is answered as "Not true", "Somewhat true" and "Certainly true". Some questions have reversed form, which is reversed in the scoring of the instrument. Replies were scored from 0 to 2, and the subscales are summed to a score ranging from 0-10 for each subscale. Added together, the first four scores generate a total difficulties score, ranging from 0 to 40. Higher scores indicate more problems.
Time frame: Measured baseline and after 12 months
Adolescents' subjective health and well-being
Adolescent's subjective health and well-being is assessed using the Kidscreen-27 questionnaire. The instrument consists of 27 items covering the following five quality of life dimensions: 1) physical well-being (5 items), 2) psychological well-being (7 items), 3) parents/guardians relations \& autonomy (7 items), 4) social support \& peers (4 items), and 5) school environment (5 items). The questions are answered on a 5-point likert scale. Scores can be created for each of the five dimensions. The methodology given in the developers manual will be used to obtain the T-scores; mean (±SD) scores of 50 ± 10 define normality for children and adolescents aged 8-18 years across Europe. Higher scores indicate a better health-related quality of life.
Time frame: Measured baseline and after 12 months
The adolescents domain specific self-evaluation of competence or adequacy
Assessed through Harter's Self-perception Profile for Adolescents (SPPA). The instrument consists of seven subscales covering the following domains: 1) scholastic competence, 2) social competence, 3) athletic competence, 4) physical appearance, 5) job competence, 6) close friendship, and 7) romantic appeal. Each subscale contains four items, each having four options: 1 (Describes me very poorly), 2 (Describes me fairly poorly), 3 (Describes me fairly well), and 4 (Describes me very well), providing a mean score of perceived competence in that area, ranging from 1 (lowest level of self-esteem) to 4 (highest level of self-esteem).
Time frame: Measured baseline and after 12 months
Symptoms of anxiety and depression
Assessed by the short version of Hopkins Symptom Checklist (HSCL-10). HSCL-10 consists of 10 symptoms or problems that people sometimes have in which adolescents answered how much the symptoms have bothered or distressed them during the last week. All 10 questions have 4 response categories: 'Not at all', 'A little', 'Quite a bit' and 'Extremely'. The responses are summarized across all items and the mean score is used as a measure of psychological distress. Higher values indicates higher psychological distress.
Time frame: Measured baseline and after 12 months
Learning environment in the classroom
The Classroom Climate Scale is used to assess learning environment. This instrument consist of 22 questions related to intrinsic and extrinsic motivation, anticipation and teacher-student relations. All questions are answered on a four-point scale: "Strongly agree", "Somewhat agree", "Somewhat disagree", "Strongly disagree". All points are summed to a total score. Higher scores indicates higher classroom environment.
Time frame: Measured baseline and after 12 months
School environment
Learning environment at school in general is self-reported in a questionnaire. It consist of three separate questions, and the questions are answered on a 7-point likert scale ranging from "totally disagree" to "totally agree". A mean score from the three questions will be made, and a higher score indicates better school environment.
Time frame: Measured baseline and after 12 months
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