PENGARUH PEMBERIAN KOMBINASI SHORT WAVE DIATHERMY DAN STRETCHING HAMSTRING TERHADAP PENINGKATAN KEMAMPUAN FUNGSIONAL PADA PASIEN OSTEOARTHRITIS KNEE UNILATERAL : THE EFFECT OF A COMBINATION OF SHORT WAVE DIATHERMY AND HAMSTRING STRETCHING ON INCREASING FUNCTIONAL ABILITY IN UNILATERAL KNEE OSTEOARTHRITIS PATIENTS. JKHWS. 2024;12(01):83-89. doi:10.47794/jkhws.v12i01.19