Self-determination theory (SDT) explains motivation through three basic psychological needs: autonomy, competence, and relatedness. When a sporting environment satisfies these needs, athletes are more likely to develop autonomous, persistent, and high-quality motivation.
In IB Sports, exercise and health science subtopic C.3.2, SDT helps explain why athletes begin, continue, or withdraw from physical activity. It distinguishes autonomous motivation, in which participation is freely chosen or personally valued, from controlled motivation, in which behavior results mainly from pressure, rewards, guilt, or punishment.
| Psychological need | Meaning in sport and exercise | Example |
|---|---|---|
| Autonomy | Feeling that one has meaningful choice and ownership over behavior | A coach allows athletes to choose between two suitable training drills. |
| Competence | Feeling capable of succeeding, improving, and mastering challenges | A beginner completes progressively harder swimming tasks and receives constructive feedback. |
| Relatedness | Feeling accepted, respected, and connected to other people | Teammates provide encouragement and make every participant feel included. |
These needs influence motivation through a clear mechanism. Choice and meaningful explanations support autonomy; achievable challenges and effective feedback build competence; and positive relationships strengthen relatedness. When all three are supported, an athlete is more likely to internalize the value of participation, sustain effort, and experience greater well-being.
When these needs are frustrated, motivation may become controlled or decrease. For example, an overly controlling coach may undermine autonomy, repeated failure may reduce competence, and exclusion from a team may weaken relatedness. This can contribute to lower enjoyment, reduced persistence, or withdrawal.
A common misconception is that autonomy means training alone or having complete freedom. In SDT, autonomy means experiencing and personal endorsement; an athlete can still follow a structured coach-led programme autonomously if its purpose is understood and accepted.
