I am not familiar with beta alanine, but it does ring a bell. I ran a Google search, and it says that this amino acid improves physical performance as it increases stamina and facilitates the production of carnosine.
If you want your muscles to remain strong and maintain powerful contractions, they need to be in an optimal pH range. If they don’t and the pH drops below that optimal level, you have significantly less strength and fatigue more quickly.
You know this is happening when you feel that familiar burn in your muscles or even when you’re lifting heavy and reach muscular failure.