Objective: To understand physical fitness of middle school students from 4 minorities in Yunnan Province and to provide the basis for the development of physical health promotion for minority middle school students. Methods: Data of physical fitness of students aged 13-18 years from the nationality of Jino, Lahu, Blang, Jingpo and Han in Yunnan Province collected during Sept. to Nov. of 2014 were analyzed. Comparative analysis was performed regarding body shape, function and quality indexes. Results: For total scores of physical fitness test, proportions of excellent and good scores were highest in the Jingpo nationality (10.8%, 57.7%), followed by the Jino nationality (6.7%, 57.4%), the Blang nationality (3.0%,30.3%) and the Lahu nationality (0.9%, 15.9%); proportions of excellent and good scores in boys were highest in the Jingpo nationality (20.1%, 54.0%), followed by the Jino nationality (6.4%, 43.9%), the Blang nationality (5.0%, 29.8%) and the Lahu nationality (1.5%, 18.1%); for girls, highest in the Jino nationality (7.1%, 71.1%), followed by the Jingpo nationality (2.4%, 61.0%), the Blang nationality (1.5%, 30.7%) and the Lahu nationality (0.5%, 14.4%). When compared with students from the Han nationality (5.1% excellent, 40.0% good), the Jingpo nationality and the Jino nationality showed higher overall scores while the Blang nationality and the Lahu nationality showed lower overall scores(Z=9.50，11.92，-11.54，-28.34，P<0.01). Conclusion Significant differences in physical fitness are observed in students with different minority background. Targeted measures should be proposed to promote physical health for minority students.

Objective: To gain a better understanding of the status quo of the physical condition of students in Lahu Nationality Middle School, so as to provide a basis for intervention measures to improve students’ physical health. Methods: A comparative analysis on the data of the physique investigation of the students in Lahu nationality middle school in 2019 and 2014 was carried out. Results: Compared with 2014, in 2019, the BMI of the males except aged 13 increased by 0.45 kg/m2, there was no statistically significant difference in the BMI of other age groups aged(P>0.05). In 2019, there was no statistically significant difference in the BMI of females aged 13 to 18 compared with 2014(P>0.05). The vital capacity/BMI respectively increased by 3.74 and 3.99 mL/kg in males aged 13 and 15, and the differences were statistically significant(t=2.36, 2.05, P<0.05). In 2019, the vital capacity/BMI of females aged 14-15 increased by 3.18, 3.64 mL/kg, respectively; the vital capacity/BMI of females aged 16 decreased by 2.50 mL/kg, the difference was statistically significant(P<0.05). For males aged 13-18 of the Lahu nationality and compared with 2014, in the 50m race, except that those aged 15, there was no statistically significant difference in the race time in other age groups(P>0.05); there was no statistically significant difference in the sit and reach of males aged 13 to 18(P>0.05); the males aged 14 was 20.52 s faster in the 1 000 m race, while those aged 17-18 were respectively 21.04 and 19.10 s slower in the-1 000 m-race, pull-ups in those aged 13 increased by 1.32, and decreased by 0.96 and 1.32 in those aged 17-18, the standing long jump of those aged 13 to 16 and 18 increased by 18.90, 16.36, 36.27, 13.32, 8.55 cm, respectively; and the differences were statistically significant(P<0.01). For females aged 13-18 of the Lahu nationality and compared with 2014, in the 50 m race, there was no statistically significant difference in the race time in those aged 13-18(P>0.05); the sit and reach of those aged 14-15 increased by 2.38 and 2.96 cm, respectively; the females aged 13-15 was 15.15, 14.48, 15.65 s faster in the 800 m race, respectively; while those aged 16-17 were respectively 18.16 and 10.74 s slower in the 800 m race; pull-ups in those aged 13-15 and 17-18 increased by 5.58, 6.97, 5.34, 2.04, 2.64, respectively; the standing long jump of those aged 13-18 increased by 14.75, 17.10, 14.76, 8.22, 10.47, 8.36 cm, respectively; and the differences were statistically significant(P<0.01). Conclusion The physical condition of middle school students in Lahu Nationality generally shows a slow-increasing trend, the physical shape of the male students presents an upward trend, and the physical fitness students shows a positive trend, albeit featured in imbalanced development. According to the problems existing in the physical development of the students in Lahu nationality, effective intervention measures should be taken to elevate the physical health condition of middle school students in Lahu nationality.