The recommended amount of physical activity for adults per week for optimal health is at least 150 minutes of moderate-intensity exercise or 75 minutes of vigorous-intensity exercise. Engaging in strength training exercises for all major muscle groups on two or more days per week is also advised. This combination supports cardiovascular fitness, muscular strength, and overall well-being. Regular physical activity can help prevent chronic diseases, maintain a healthy weight, and improve mental health, making it a crucial aspect of a healthy lifestyle.