The average 8th-grade 1000-meter run score in the United States is approximately 3:30 to 4:00. This range reflects the general performance level of 8th graders, with faster times indicating better fitness and endurance. The variability in scores is influenced by factors such as individual fitness levels, training, and the specific conditions of the race, including weather and track conditions.

The average 1000-meter run time for 8th graders is influenced by several factors. Firstly, physical fitness plays a significant role. Regular physical activity, especially cardiovascular exercises, can improve endurance and speed, leading to better performance in the 1000-meter run. Secondly, training and practice are crucial. A structured training program that includes interval training, distance running, and strength training can enhance performance. Additionally, the age and gender of the runner also contribute to the variability in scores. Generally, boys tend to have faster times than girls due to biological differences, but this can vary widely among individuals.

Data from the National Youth Fitness Survey (NYFS) provides insights into the average 1000-meter run times for 8th graders. According to the 2018 NYFS, the average 1000-meter run time for 8th-grade boys was 3:35, while for girls, it was 4:10. These figures demonstrate the average performance level and the gender gap in 1000-meter running among 8th graders in the United States. It's important to note that these averages can vary significantly based on the specific population and the context of the race. For example, students from schools with strong athletic programs or access to quality training facilities may have faster times than those from less resourced schools.