“USING VARIABLE RATIOS IN PERIODS OF WORK TO REST AND ITS REFLECTION TO DEVELOPING SOME PHYSICAL VARIABLES FOR HANDBALL PRACTITIONERS AGED 40-50 YEARS”, Res. Jou. Ana.Inv., vol. 3, no. 06, pp. 1–12, Jun. 2022, doi: 10.17605/OSF.IO/FV7W4.