如何科学运动？国家卫生健康委提供指引

Group 1 - The article emphasizes the importance of scientific exercise and the need for proper warm-up and stretching before and after physical activities [1] - It highlights the current seasonal transition, suggesting that the cooler weather is an ideal time for engaging in sports and physical activities [1] - The National Health Commission has issued health tips to the public regarding safe exercise practices to avoid physical strain [1] Group 2 - The article suggests that there are specific exercise postures that may lead to knee joint injuries, indicating a need for awareness and education on proper techniques [1] - A video is mentioned as a resource for understanding how to exercise scientifically and avoid injuries [1]