Latar Belakang: Kebugaran jasmani adalah kemampuan seseorang untuk berkegiatan tanpa mengalami kelelahan berlebih, sehingga tubuh masih memiliki energi cadangan untuk menyelesaikan beban tambahan. Data menunjukkan tingkat kebugaran jasmani pada anak usia sekolah dan remaja dengan kategori kategori kurang sekali 63.93%.
Tujuan: Mengetahui hubungan kebiasaan olahraga, persen lemak tubuh, dan kebiasaan sarapan terhadap tingkat kebugaran jasmani pada remaja putri di Pondok Pesantren as-Salafy al-Fithrah Kota Semarang.
Metode: Penelitian ini menggunakan desain penelitian cross-sectional study dengan jumlah sampel sebanyak 41 orang. Pengambilan data meliputi kebiasaan olahraga menggunakan kuesioner olahraga, persen lemak tubuh menggunakan Timbangan BIA (Bioelectrical Impedance Analysis), kebiasaan sarapan menggunakan metode food recall 4x24 jam, dan tingkat kebugaran jasmani diukur dengan bleep test. Pengukuran bivariat menggunakan uji korelasi Gamma.
Hasil: Responden esponden memiliki karakteristik kebiasaan olahraga kurang sebanyak 73,1%; persen lemak tubuh normal sebanyak 43,9%; kebiasaan sarapan kurang sebanyak 51,2; tingkat kebugaran jasmani kurang sekali sebanyak 75,6%. Hasil analisis bivariat terdapat hubungan kebiasaan olahraga (p = 0,000) terhadap tingkat kebugaran jasmani pada remaja putri di Pondok Pesantren as-Salafy al-Fithrah Kota Semarang
Kesimpulan: Terdapat hubungan kebiasaan olahraga terhadap tingkat kebugaran jasmani pada remaja putri di Pondok Pesantren as-Salafy al-Fithrah Kota Semarang.

ABSTRACT:
Background: Physical fitness is a person's ability to do activities without experiencing excessive fatigue, so that the body still has reserve energy to complete additional loads. Data shows the level of physical fitness in school-age children and adolescents with a very poor category of 63.93%.
Objective: To determine the relationship between exercise habits, body fat percentage, and breakfast habits to the level of physical fitness in female adolescents at the As-Salafy al-Fithrah Islamic Boarding School in Semarang City..
Method: This study used a cross-sectional study design with a sample of 41 people. Data collection included exercise habits using a sports questionnaire, body fat percentage using the BIA Scale, breakfast habits using the 4x24 hour food recall method, and physical fitness levels were measured by the bleep test. Bivariate measurements used the Gamma correlation test.
Results: Respondents had the characteristics of poor exercise habits of 73.1%; normal body fat percentage of 43.9%; poor breakfast habits of 51.2; very poor physical fitness levels of 75.6%. The results of the bivariate analysis showed a relationship between exercise habits (p = 0.000) and the level of physical fitness in female adolescents at the As-Salafy al-Fithrah Islamic Boarding School in Semarang City.
Conclusion: There is a relationship between exercise habits and the level of physical fitness in female adolescents at the As-Salafy al-Fithrah Islamic Boarding School in Semarang City.