Health-Related Physical Fitness of Secondary School Students in Nonthaburi

Abstract

This research aimed to: 1) examine the physical fitness levels of secondary school students in a school in Nonthaburi Province, and 2) analyze the results of physical fitness tests of these students. The research population consisted of 2,445 students from Grades 7–12 (Matthayom 1–6) in the academic year 2025. Using Krejcie and Morgan’s sampling method, a sample of 340 students was selected. The study employed the physical fitness test and standard criteria for children and youth aged 7–18 years, developed by the Sports Science Division, Department of Physical Education, Ministry of Education (2019). Data were analyzed using mean and standard deviation. The findings revealed that: 1) Regarding body mass index (BMI), the majority of students were in the normal range (138 students), followed by underweight (125 students), overweight (45 students), and obese (32 students). For the sit-and-reach test, most students were at a very low level (217 students), followed by low (83), moderate (35), and good (5). For the modified push-up test (30 seconds), most were at a very low level (202), followed by low (80), moderate (38), good (17), and very good (3). For the sit-up test (60 seconds), most students were at a low level (129), followed by moderate (91), very low (86), good (24), and very good (10). For the 3-minute step test, most were at a very good level (130), followed by very low (57), low (56), moderate (54), and good (43). 2) The mean and standard deviation of male and female students’ physical fitness were as follows: (2.1) BMI: 20.77 (SD = 4.98) and 20.50 (SD = 4.92); (2.2) Sit-and-reach: 2.85 (SD = 9.76) and 3.96 (SD = 9.84); (2.3) Modified push-ups: 17.04 (SD = 7.92) and 9.70 (SD = 7.89); (2.4) Sit-ups: 30.87 (SD = 8.69) and 19.65 (SD = 8.69); and (2.5) Step test: 189.89 (SD = 82.08) and 147.50 (SD = 82.54), respectively.The results highlight variations in physical fitness components among secondary school students, with strengths in cardiovascular endurance but weaknesses in flexibility and muscular endurance. These findings provide useful information for designing targeted physical education programs to improve student fitness.