Latar Belakang: Tingkat kebugaran jasmani perlu diperhatikan, khususnya remaja putri di pondok pesantren. Rendahnya kebugaran jasmani dapat menyebabkan meningkatnya resiko masalah kesehatan, kelelahan, dan hilangnya konsentrasi yang berdampak pada penurunan produktivitas dan prestasi.
Tujuan: Mengetahui hubungan aktivitas fisik, kualitas tidur, dan status gizi terhadap tingkat kebugaran jasmani remaja putri di Pondok Pesantren as-Salafy al-Asror Kota Semarang.
Metode: Penelitian ini merupakan penelitian cross sectional dengan jumlah sampel sebanyak 65 orang. Sampel diperoleh melalui metode simple random sampling. Data aktivitas fisik diperoleh dengan menggunakan form recall aktivitas fisik 2 x 24 jam. Data kualitas tidur diperoleh dari form PSQI (Pitssburg Sleep Quality Index). Data status gizi diperoleh dari hasil perhitungan IMT/U. Data kebugaran jasmani deperoleh dari hasil MFT (Multistage Fitness Test). Analisis data menggunakan program SPSS (Statistical Package for the Social Sciences).
Hasil: Aktivitas fisik memiliki hubungan dengan kebugaran jasmani dengan nilai p=0,002. Kualitas tidur memiliki hubungan dengan kebugaran jasmani dengan nilai p=<0,001. Status gizi tidak memiliki hubungan dengan kebugaran jasmani dengan nilai p=0,678. Diketahui juga bahwa faktor yang memiliki pengaruh paling signifikan dengan kebugaran jasmani adalah aktivitas fisik dengan nilai odds ratio sebesar 36,5.
Kesimpulan: Terdapat hubungan antara aktivitas fisik dan kualitas tidur dengan kebugaran jasmani. Namun, tidak terdapat hubungan antara status gizi dengan kebugaran jasmani.

ABSTRACT:
Background: The level of physical fitness of the Indonesian people still needs attention, especially adolescent girls in Islamic boarding schools. Low physical fitness can cause an increased risk of health problems, fatigue, and loss of concentration which has an impact on decreased productivity and achievement.
Objective: To determine the relationship between physical activity, sleep quality and nutritional status on the physical fitness level of adolescent girls at the as-Salafy al-Asror Islamic Boarding School, Semarang City.
Method: This research is a cross sectional design with a sample size of 65 people. The sampling was carried out using the simple random sampling method. Physical activity data was obtained using a 2 x 24 hour physical activity recall form. Sleep quality data was obtained from the PSQI (Pittsburg Sleep Quality Index) form. Nutritional status data is obtained from the results of BMI for age calculations. Physical fitness data was obtained from the results of the MFT (Multistage Fitness Test). Data analysis used the SPSS (Statistical Package for the Social Sciences).
Result: Physical activity has a relationship with physical fitness with a value of p=0,002. Sleep quality has a relationship with physical fitness with a value of p=<0,001. Nutritional status has no relationship with physical fitness with a p value = 0,678. It is also known that the factor that has the most significant influence on physical fitness is physical activity with an odds ratio of 36,5.
Conclusion: There is a relationship between physical activity and sleep quality and physical fitness. However, there is no relationship between nutritional status and physical fitness.