عبد الستار هاشمم. and حسن رزوقيط. 2019. Study the performance of some physical and mental capacity for the day zero and embarrassment according to bio-rhythm. Journal of Physical Education. 20, 3 (Jun. 2019), 184-199. DOI:https://doi.org/10.37359/JOPE.V20(3)2008.789.