Related Experiment Video
Updated: May 26, 2026

Validation of a Psychosocial Intervention on Body Image in Older People: An Experimental Design
Published on: May 31, 2021
Effects of an autonomy-supportive exercise instructing style on exercise motivation, psychological well-being, and
Frederiki C Moustaka1, Symeon P Vlachopoulos, Chris Kabitsis
1Dept of Physical Education and Sport Science at Serres, Aristotle University of Thessaloniki, Aghios Ioannis Serres, Greece.
Background:
The present study evaluated the effectiveness of an autonomy-supportive intervention based on self-determination theory in influencing perceptions of autonomy support, basic psychological needs, behavioral regulations, subjective vitality, and exercise behavior.
Methods:
35 female exercise participants age 30 to 58 years who enrolled to an 8-week exercise program attended 24 exercise classes that were taught using either an autonomy-supportive (n = 19) or a lack of autonomy support (n = 16) instructing style.
Results:
The experimental group reported an increase in perceived autonomy support, the fulfillment of the needs for autonomy and competence, identified regulation, intrinsic motivation, and subjective vitality. They also reported higher attendance rates during the program and greater participation to moderate and/or mild nonstructured exercise during 5 weeks after the end of the program. The control group reported a decrease in perceived autonomy support, the needs for autonomy and competence, intrinsic motivation, and subjective vitality.
Conclusion:
The results supported tenets of self-determination theory and highlighted the motivational and psychological benefits of an autonomy-supportive exercise instructing style among middle-age women.
Related Concept Videos
Stress Prevention and Stress Management Techniques VI
Motivation and Self-Determination
Motivation, the driving force behind behavior, plays a pivotal role at every stage of the change process. The research...
Stress Prevention and Stress Management Techniques I
Conscientiousness
Conscientious individuals tend to be organized, responsible, and disciplined. They prioritize completing tasks and following structured routines,...
Ryan and Deci's Self-Determination Theory
Autonomy is the need to feel in control of one's actions and decisions. For example, a student who chooses their research topic is likely to be more engaged and motivated than one who is...
Self-Regulation
Sources of Self-Esteem II: Performance Feedback
Exercise and Cardiac Output
Sustained exercise increases the muscles' oxygen demand, which can be met...
