Gerhanawati, I. PENGARUH KNEE TO CHEST DAN PELVIC TILTING EXERCISE TERHADAP FLEKSIBILITAS PUNGGUNG BAWAH PADA PEKERJA ADMINISTRASI DALAM AKTIVITAS DUDUK LAMA: The Effects of Knee-To-Chest and Pelvic Tilting Exercise on Lower Back Flexibility of Administrative Officers Who Sit for A Long Period . Jikep 2021, 7, 195-203.