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Predicting Accelerometer-Assessed Estimates of Adolescents' Multidimensional Physical Activity: A Self-Determination

Lydia G Emm-Collison1, Martyn Standage1, Fiona B Gillison1

  • 1Centre for Motivation and Health Behaviour Change, Department for Health, University of Bath, Bath, United Kingdom.

Journal of Sport & Exercise Psychology
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Summary

Supportive environments foster autonomous motivation for physical activity in adolescents. Fostering psychological need satisfaction is key for increasing light physical activity (LPA) and moderate to vigorous physical activity (MVPA).

Keywords:
device-measured activitymotivationneed supportneed thwartingpsychological needs

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Area of Science:

  • Behavioral Science
  • Adolescent Health
  • Exercise Psychology

Background:

  • Self-determination theory provides a framework for understanding motivation in behavior.
  • Understanding motivational pathways is crucial for promoting physical activity in adolescents.

Purpose of the Study:

  • To test a dual-process model of motivational processes predicting physical activity in adolescents.
  • To examine the roles of psychological need support and thwarting in adolescent physical activity.
  • To investigate the mediating effects of psychological need satisfaction/frustration and autonomous/controlled motivation.

Main Methods:

  • Adolescents (N=338, ages 11-15) completed questionnaires on self-determination theory variables.
  • Objective physical activity was measured using accelerometers over 8 days.
  • A dual-process model was statistically analyzed to assess motivational pathways.

Main Results:

  • Psychological need support positively predicted light physical activity (LPA) and moderate to vigorous physical activity (MVPA).
  • This effect was mediated by psychological need satisfaction and autonomous exercise motivation.
  • Psychological need thwarting did not significantly predict physical activity outcomes.

Conclusions:

  • Need-supportive environments are crucial for enhancing autonomous motivation and physical activity in adolescents.
  • Interventions should focus on fostering psychological need satisfaction to promote exercise.
  • Future research could explore the nuances of need thwarting in different contexts.