ميرزا أطا. The impact of a training curriculum for the tolerance of using (training mask) in some functional indicators for the 400 meters and 800 meters for the junior class. ms [Internet]. 2018 Dec. 30 [cited 2024 Dec. 22];17(4). Available from: https://jcopew.uobaghdad.edu.iq/index.php/sport/article/view/825