BCAAs produce a different effect on the body depending on when they are taken.
Taking BCAAs before training serves primarily to protect the muscles since the body first uses BCAAs for energy instead of consuming the muscle protein reserves themselves. BCAAs create an anabolic environment in the muscles, so many athletes consume BCAAs before training to ensure their training is more anabolic and less catabolic.
Powdered BCAAs can be mixed with water in a shaker to drink during training. These amino acids, along with a product that provides energy and hydration, can be of great help to nourish the muscles while you train and to be able to carry out more intense and demanding workouts.
Taking BCAAs after training stimulates muscle protein synthesis. In this way, after applying the physical incentives for growth during training, muscle mass is increased more effectively. Taking BCAAs after training is also great for muscle recovery and repair because the BCAAs help your muscle fibers to heal.