Final answer:
Behavior plays a crucial role in physical fitness levels. Engaging in regular exercise and adopting healthy habits such as proper nutrition and sleep are essential for improving and maintaining physical fitness.
Step-by-step explanation:
The role of behavior in physical fitness levels is significant. Consistent engagement in physical activity and adopting healthy habits are crucial for improving and maintaining physical fitness. For instance, participating in regular exercise such as running or strength training can enhance cardiovascular endurance, muscular strength, and flexibility. Additionally, healthy habits like proper nutrition and sufficient sleep also contribute to overall physical fitness.
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