BCAA's can also help reduce muscle soreness and fatigue, both during the workout and during recovery. BCAA's have been shown to reduce the damage to muscle that occurs during a workout, thus aiding in the recovery process and reducing soreness levels. This can help you stay more active during your off days, decrease the discomfort associated with a tough workout, and get you back in the game sooner.
A real problem while on a fitness regimen, especially if you do a lot of steady-state cardio, is muscle wasting. During cut phases, bodybuilders and athletes try and cut fat while preserving muscle, a difficult task since the body is naturally inclined to burn muscle for energy. This is also a problem associated with doing too much steady-state cardio. BCAA's help the body hold on to that muscle and burn fat for energy instead.