The goal of applied science is

Applied science is an application of acquired knowledge. It takes up the knowledge that has being acquired or learnt from basic science and also solves or finds a solution for the existing problems.

creative diagnostics provides a protocol for total protein extraction based on ripa which is widely used.

the answer is lactic acid from anaerobic respiration. the acid in lactic acid is what creates sore and burning muscles. if you think about how acid burns that will give you a clue for questions like this.