Dear teacher: I am writing this critical letter to express my sincere apologies for my improper behavior-running exercises and leaving early, and to express my deep reflection on its impact. Last week's running practice, I left the team without authorization and returned to the classroom early. This behavior is a serious violation of the rules and regulations of the school and has an impact on your teaching plan.

I realized that my behavior was irresponsible and disrespectful to others. I know this behavior is not only irresponsible to myself, but also disrespectful to others. I understand that as a student, I should abide by the rules and regulations of the school, respect teachers' teaching achievements and actively participate in group activities, but my behavior deviates from these principles. I am deeply guilty and ashamed of this.

Through this incident, I deeply realized my mistakes and shortcomings. I understand that as a student, I should establish correct values and ethics, strictly abide by the rules and regulations of the school, actively participate in group activities, and respect the rights and dignity of others. I will take this as a lesson, try to correct my mistakes and prove my determination with practical actions.

Finally, I sincerely apologize to you again. Please believe that I have learned my lesson and won't make the same mistake again. Hope to get your understanding and tolerance.

The significance of running exercise to the body;

1, improve physical fitness: it can reduce cholesterol, reduce the probability of thrombosis, exercise vital capacity, benefit heart health, enhance immunity, help shape the body, and make people look more energetic and energetic.

2. Enhance collective consciousness: Everyone should perform their duties, and a sense of collective honor can be cultivated through running and exercise.

3. Strengthen the concept of discipline: completing the running exercise at the specified time and place can increase everyone's concept of discipline and improve their sense of discipline.

4. Exercise willpower: Running early every day can not only develop the beauty of the body and the coordination of movements, but also form a person's character and exercise willpower.