PURPOSE: This study examined mean differences in, and relationships among, motivational
regulations and physical activity in three different age groups (young adults: 18–24, adults …

Background It is important to engage in regular physical activity in order to maintain a
healthy lifestyle however a large portion of the population is insufficiently active …

According to social—cognitive theory, an individual's motivation to engage in physical
activity is based on three postulates: self-efficacy, outcome expectations, and self-evaluated …

This study examined the utility of motivation as advanced by self-determination theory (Deci
& Ryan, 2000) in predicting objectively assessed bouts of moderate-intensity exercise …

Grounded in self-determination theory (Deci & Ryan, 2000), the purpose of this work was to
examine effects of the content and motivation of adults' exercise goals on objectively …

This investigation explored motivations for engaging in physical activity and how they varied
across the lifespan. A total of 1,885 individuals completed a comprehensive questionnaire …

This study tested the self-determination theory in relation to exercise participation with the
aim of identifying whether degree of autonomy mediates the relationship between …

A predominate motivation theory used to predict exercise behavior is self-determination
theory, which posits that motivation is driven by satisfaction of three basic psychological …

Background In recent years, there has been a decline in physical activity among adults.
Motivation has been shown to be a crucial factor in maintaining physical activity. The …

Purpose To determine whether naturally-occurring changes in intrinsic motivation,
behavioral regulation, and goals mitigate declining physical activity among adolescents …