The use of anabolic steroids to increase muscle mass has become widespread despite International Olympic Committee (IOC) gave order not to use these potent drugs to enhance, performance. The present study was undertaken to determine the effects of 4 weeks administration of Testex(testosterone propionate) upon levels of performance, organ weights in adult albino rats. Animals were injected daily (I.M) with a placebo (corn oil), low dose (.5mg /kg) or high dose (5mg/kg) of Testex and subjected 5 days/week to one of 2 treatments: sedentary housing, or forced-swimming. At final day all animals allowed to swim until to? death to check the endurance time and rapidly extracted internal organs (heart, liver, kidney and testes) after being drowned to weigh the weights.
Heart, weights increased in exercised rats. Heart muscle was significantly affected in rat’s injected low doses in both sedentary and swimming groups. Endurance time was prolonged by exercise significantly.
The effect of Textex to endurance time was significant in sedentary group but not in exercised group.
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