Final answer:
Having a strong physical fitness can have positive effects on mental and social health.
Step-by-step explanation:
Havig a strong physical fitness can have positive effects on the other two sides of the Health triangle, which are mental health and social health.
Physically fit individuals are less likely to experience stress and are more likely to have better mental health due to the release of endorphins through exercise, which can reduce anxiety and depression.
Furthermore, physical fitness can improve social health by increasing self-confidence and promoting positive interactions with others through participation in sports or physical activities.