This document discusses how to manage work-related stress through physical activity and diet. It defines stress as the body's response and adaptation to stressors. There is a relationship between stress levels and performance, with peak performance occurring at moderate stress levels. Physical activity and a healthy diet can help improve stress management and performance. The document provides recommendations for physical activity, including 150 minutes of moderate aerobic exercise weekly, and for diet, such as drinking 1.5 liters of water daily and eating balanced, nutrient-rich meals regularly. It presents a case study of how following these recommendations helped reduce one person's stress levels and improve their job performance over 12 weeks.