Dynamic analysis of speed and endurance among Urumqi primary and secondary school students during the past 30 years

Objective To analyze dynamic changes in speed and endurance among Urumqi Han students during 1985-2014.Methods Data came from National Survey of Student Health and Physical Fitness in Urumqi during 1985-2014.Indices of speed and endurance among primary and secondary school students aged 7-18 years were analyzed.Results During the past 30 years,50 m dash performance has decreased significantly from 1985 to 1995 years,most obvious among boys with 0.1 s reduction (P<0.05);The same trend was observed in endurance indices,urban students still had higher endurance performance despite of significant reduction during 1985-2014 compared to rural students.Endurance running performance among students aged 10-12 years showed a consistent downward trend among both boys and girls,most notable among boys with 42.03 s reduction;For students aged 13-18 years,the same decreasing trend in urban and rural areas was noticed,however,the reduction has ceased during 2005 -2010,but continued falling in 2010-2014 among urban students.Conclusion Speed and endurance performance among Urumqi students has decreased during the past 30 years,most notable in rural areas and boys.There is a great need for further investigation on causes of the decline in endurance performance and developing corresponding effective intervention for Urumqi students.