S. Ismawati, Heru Sulistianta, Joan Siswoyo, and Lungit Wicaksono, “The Relationship Between Stress Levels And Physical Activity On The Physical Fitness Level Of Students At SMA Negeri 1 Talang Padang, Tanggamus Regency”, JPJ, vol. 6, no. 1, pp. 73-89, Jul. 2025.