Peran Latihan Fisik terhadap Tekanan Darah, Kadar ENOS, TGF-ß1, Elektrokardiogram, dan Ketebalan Miokardium pada Model Tikus Hipertensi yang diinduksi L-NAME = Effect of Physical Exercise on Blood Pressure, eNOS and TGF--ß1 Levels, Electrocardiogram, and Myocardial Thickness in L-NAME-induced Hypertension Rat Model