Which factor can influence an athlete's motivation according to motivational theories?

Motivation in athletes is significantly influenced by environmental changes, which can include various aspects such as coaching styles, the support system from teammates and family, or the overall atmosphere of the training and competition settings. Motivational theories assert that an athlete's drive can be affected by both internal and external factors, and environmental changes are particularly potent as they can alter an athlete's perception of their capabilities and the value they place on achieving their goals.

For example, a supportive coaching environment that fosters positive reinforcement can enhance motivation, while a competitive or high-stress atmosphere may either encourage or discourage an athlete, depending on their individual responses to such environments. The ability to adapt to these changes can significantly impact an athlete's commitment and persistence in their sport.

In contrast, while physical size and strength, the type of sport played, and age can influence performance and opportunities in sports, they do not directly reflect the motivational dynamics that come from environmental contexts and atmospheres that athletes navigate through their training and competitions.