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THE DIFFERENCE OF THE EFFECTIVENESS OF INTERVENTION MUSCLE ENERGY TECHNIQUE AND INTERVENTION ACTIVE ISOLATED STRETCHING IN IMPROVING HAMSTRING MUSCLES FLEXIBILITY OF FOOTBALL PLAYERS IN SMAN 1 SEMARAPURA.
<em>Majalah Ilmiah Fisioterapi Indonesia, 5</em>(1), 20-23.
doi:10.24843/MIFI.2017.v05.i01.p06