for a 13 year old is 6:40 a good mile time and is 3:35 a good 1k time

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To determine whether a time is considered good in running, it helps to compare it with average times for individuals of similar age and experience. However, I can provide you with some general information on mile and 1k times for a 13-year-old.

For a 13-year-old, a good mile time could range between 6 minutes and 8 minutes. Completing a mile in 6 minutes and 40 seconds would be considered a good time, especially if you're just starting out. It shows good speed and endurance.

Regarding a 1k time, a good benchmark for a 13-year-old could be around 4 minutes to 5 minutes. Achieving a time of 3 minutes and 35 seconds for a 1k would be impressive and could indicate a high level of fitness.

Keep in mind that every runner is different and progresses at their own pace. It's important not to compare yourself too much with others but rather focus on improving your own performance. Training regularly, incorporating proper warm-ups and cooldowns, and gradually increasing your running distance and speed can help you improve your times over time.