A 3-year longitudinal analysis of changes in fitness, physical activity, fatness and screen time

L Aires, Lars Bo Andersen, D Mendonça, C Martins, G Silva, J Mota

Research output: Contribution to journalJournal articleResearchpeer-review

Abstract

AIM: To analyse whether changes in physical activity index (PAI), screen time (ST: television, computer) and body mass index (BMI) made a contribution to longitudinal changes in fitness of children and adolescents. Additionally, we analysed the interaction between baseline fitness level and changes in fitness. METHODS: This is a 3-year longitudinal study of 345 high school students aged 11-19 years. Students performed curl-ups, push-ups and 20-m shuttle run tests from Fitnessgram. PA and ST were evaluated using a standard questionnaire. Standardized scores of fitness tests were summed. Changes over time were calculated as Delta(1) (2007 minus 2006), Delta(2) (2008 minus 2007) and Delta(3) (2008 minus 2006). RESULTS: Changes in PAI were positively and independently associated with changes in fitness in Delta(1), Delta(2) and Delta(3). Changes in BMI were negatively associated with changes in fitness in Delta(3). Participants highly fit at baseline were those who showed positive changes in PAI over Delta(3), decreased changes in ST and had the lowest increase in BMI over 3 years compared with those low-fit at baseline. CONCLUSIONS: Changes in BMI were associated with changes in fitness over 3 years. However, changes in PAI were the best predictor for changes in fitness in each year and over the 3 years of evaluation in youth.
Original languageEnglish
JournalActa Paediatrica
Volume99
Issue number1
Pages (from-to)140-4
Number of pages4
ISSN0803-5253
DOIs
Publication statusPublished - 1. Jan 2010

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Body Mass Index
Exercise
Longitudinal Studies

Keywords

  • Adolescent
  • Adolescent Behavior
  • Body Mass Index
  • Child
  • Child Behavior
  • Computers
  • Exercise
  • Female
  • Humans
  • Linear Models
  • Longitudinal Studies
  • Male
  • Motor Activity
  • Physical Fitness
  • Questionnaires
  • Television
  • Time Factors
  • Young Adult

Cite this

Aires, L ; Andersen, Lars Bo ; Mendonça, D ; Martins, C ; Silva, G ; Mota, J. / A 3-year longitudinal analysis of changes in fitness, physical activity, fatness and screen time. In: Acta Paediatrica. 2010 ; Vol. 99, No. 1. pp. 140-4.
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abstract = "AIM: To analyse whether changes in physical activity index (PAI), screen time (ST: television, computer) and body mass index (BMI) made a contribution to longitudinal changes in fitness of children and adolescents. Additionally, we analysed the interaction between baseline fitness level and changes in fitness. METHODS: This is a 3-year longitudinal study of 345 high school students aged 11-19 years. Students performed curl-ups, push-ups and 20-m shuttle run tests from Fitnessgram. PA and ST were evaluated using a standard questionnaire. Standardized scores of fitness tests were summed. Changes over time were calculated as Delta(1) (2007 minus 2006), Delta(2) (2008 minus 2007) and Delta(3) (2008 minus 2006). RESULTS: Changes in PAI were positively and independently associated with changes in fitness in Delta(1), Delta(2) and Delta(3). Changes in BMI were negatively associated with changes in fitness in Delta(3). Participants highly fit at baseline were those who showed positive changes in PAI over Delta(3), decreased changes in ST and had the lowest increase in BMI over 3 years compared with those low-fit at baseline. CONCLUSIONS: Changes in BMI were associated with changes in fitness over 3 years. However, changes in PAI were the best predictor for changes in fitness in each year and over the 3 years of evaluation in youth.",
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Aires, L, Andersen, LB, Mendonça, D, Martins, C, Silva, G & Mota, J 2010, 'A 3-year longitudinal analysis of changes in fitness, physical activity, fatness and screen time', Acta Paediatrica, vol. 99, no. 1, pp. 140-4. https://doi.org/10.1111/j.1651-2227.2009.01536.x

A 3-year longitudinal analysis of changes in fitness, physical activity, fatness and screen time. / Aires, L; Andersen, Lars Bo; Mendonça, D; Martins, C; Silva, G; Mota, J.

In: Acta Paediatrica, Vol. 99, No. 1, 01.01.2010, p. 140-4.

Research output: Contribution to journalJournal articleResearchpeer-review

TY - JOUR

T1 - A 3-year longitudinal analysis of changes in fitness, physical activity, fatness and screen time

AU - Aires, L

AU - Andersen, Lars Bo

AU - Mendonça, D

AU - Martins, C

AU - Silva, G

AU - Mota, J

PY - 2010/1/1

Y1 - 2010/1/1

N2 - AIM: To analyse whether changes in physical activity index (PAI), screen time (ST: television, computer) and body mass index (BMI) made a contribution to longitudinal changes in fitness of children and adolescents. Additionally, we analysed the interaction between baseline fitness level and changes in fitness. METHODS: This is a 3-year longitudinal study of 345 high school students aged 11-19 years. Students performed curl-ups, push-ups and 20-m shuttle run tests from Fitnessgram. PA and ST were evaluated using a standard questionnaire. Standardized scores of fitness tests were summed. Changes over time were calculated as Delta(1) (2007 minus 2006), Delta(2) (2008 minus 2007) and Delta(3) (2008 minus 2006). RESULTS: Changes in PAI were positively and independently associated with changes in fitness in Delta(1), Delta(2) and Delta(3). Changes in BMI were negatively associated with changes in fitness in Delta(3). Participants highly fit at baseline were those who showed positive changes in PAI over Delta(3), decreased changes in ST and had the lowest increase in BMI over 3 years compared with those low-fit at baseline. CONCLUSIONS: Changes in BMI were associated with changes in fitness over 3 years. However, changes in PAI were the best predictor for changes in fitness in each year and over the 3 years of evaluation in youth.

AB - AIM: To analyse whether changes in physical activity index (PAI), screen time (ST: television, computer) and body mass index (BMI) made a contribution to longitudinal changes in fitness of children and adolescents. Additionally, we analysed the interaction between baseline fitness level and changes in fitness. METHODS: This is a 3-year longitudinal study of 345 high school students aged 11-19 years. Students performed curl-ups, push-ups and 20-m shuttle run tests from Fitnessgram. PA and ST were evaluated using a standard questionnaire. Standardized scores of fitness tests were summed. Changes over time were calculated as Delta(1) (2007 minus 2006), Delta(2) (2008 minus 2007) and Delta(3) (2008 minus 2006). RESULTS: Changes in PAI were positively and independently associated with changes in fitness in Delta(1), Delta(2) and Delta(3). Changes in BMI were negatively associated with changes in fitness in Delta(3). Participants highly fit at baseline were those who showed positive changes in PAI over Delta(3), decreased changes in ST and had the lowest increase in BMI over 3 years compared with those low-fit at baseline. CONCLUSIONS: Changes in BMI were associated with changes in fitness over 3 years. However, changes in PAI were the best predictor for changes in fitness in each year and over the 3 years of evaluation in youth.

KW - Adolescent

KW - Adolescent Behavior

KW - Body Mass Index

KW - Child

KW - Child Behavior

KW - Computers

KW - Exercise

KW - Female

KW - Humans

KW - Linear Models

KW - Longitudinal Studies

KW - Male

KW - Motor Activity

KW - Physical Fitness

KW - Questionnaires

KW - Television

KW - Time Factors

KW - Young Adult

U2 - 10.1111/j.1651-2227.2009.01536.x

DO - 10.1111/j.1651-2227.2009.01536.x

M3 - Journal article

C2 - 19839960

VL - 99

SP - 140

EP - 144

JO - Acta Paediatrica

JF - Acta Paediatrica

SN - 0803-5253

IS - 1

ER -