Improved Blood Flow: Sildenafil improves the blood flow by relaxing blood vessels thus allowing easier circulation of oxygen throughout human body. The improved blood flow may have a positive influence on the muscles by delivering more oxygen, nutrients as well as hormones necessary for the muscle’s growth, repair and recovery.Increased Oxygenation: In addition enhanced blood flow promoted via sildenafil will lead to better oxygen supply into muscles. Oxygen is needed for energy production required during workout sessions thus greater oxygenation can result in better endurance levels besides reducing fatigue hence improvement of performance rate during exercising.Enhanced Recovery: For instance, sildenafil could affect blood flow which would improve oxygenation within tissues and facilitate removal of metabolic end products such as lactic acid from muscles. Consequently recovery period becomes shorter, there is less soreness experienced after training and possibility exists of conducting such sessions often enough with great effect.As we have observed above, oxandrolone is useful at preventing catabolism that results from low calorie intake or/and excessive exercise while promoting anabolism.