Zaher Yahya , S., Kazem Abdul Rida, B. and Waleed Abdulkareem, O. 2024. The effect of a laser device on some biomechanical variables of the rotational phase in the achievement of 100 m freestyle swimming for the Iraqi team (16-18 years old). Scientific Journal of Sport and Performance. 3, 4 (Jul. 2024), 507–512. DOI:https://doi.org/10.55860/ZHOW5603.