Seasonal affective disorder (SAD) can negatively impact physical activity levels, especially during winter months when natural light decreases. Many individuals experience fatigue and lack motivation, leading to reduced outdoor activity. This sedentary behavior exacerbates symptoms of SAD, creating a cycle of inactivity and poor mental health. Engaging in regular exercise can combat these effects by releasing endorphins, improving mood, and promoting a sense of well-being. Maintaining a consistent fitness routine, even indoors, can help mitigate the impact of SAD on physical health.