HUBUNGAN FLEKSIBILITAS OTOT HAMSTRING TERHADAP KESEIMBANGAN DINAMIS PADA LANSIA DI DESA SERAI, KINTAMANI - Rahayu, Puji Agustine Sri (Bachelor of Physiotherapy and Physiotherapy Profession Study Program, Faculty of Medicine, Udayana University in collaboration with Indonesian Physiotherapy Association (IPA), 2019)