Sarifitri FH Hutagalung, Ferial Hadipoetro Idris, and Luh K Wahyuni (1) “Standard Value of Lower Extremity Muscle Strength of 8 Years Old Children and Its Correlation with Body Weight and Height”, Indonesian Journal of Physical Medicine and Rehabilitation, 2(01), pp. 45 - 54. doi: 10.36803/ijpmr.v2i01.226.