Abstract The research aims to know the effect of the effort associated with ischemia and hyperemia of the upper extremities (the arms) in developing some functional variables by blocking the artery in the working muscle for a specific period ranging from 1-2 minutes as the oxygen level within the muscle tissue decreases by obstructing the passage of arterial blood flow (oxygenated blood) ) To the cells, which leads to a state of ischemia, i.e. training with lack of oxygen, and this process is accompanied by an increase in the accumulation of lactic acid in the muscles and expansion of blood vessels, and upon completion of the state of ischemia, i.e. when the artery is opened and allowing the passage of arterial blood naturally (hyperemia) during which blood flow to cells increases, as The blood circulation supplies the muscles with oxygen and removes the remnants of the cellular reaction that cause the widening of the arteries. Lactic acid is eliminated by oxidizing it and converting some of it to other compounds. The research sample included (6) swimmers from the Iraqi national team free swimming for the applicants, which were divided into two experimental and control groups to find out the extent. Development in some functional variables and achievement in the 50m freestyle.