In conclusion, lactic acid fermentation is an important energy pathway during high-intensity exercise. It allows the production of ATP in the absence of oxygen, which is necessary to sustain high levels of muscle contraction. However, the accumulation of lactic acid can lead to muscle fatigue and ultimately limit performance. Training and conditioning can help an athlete improve their ability to tolerate lactic acid buildup and delay the onset of fatigue. Additionally, proper nutrition, hydration, and recovery can also help improve sports performance in athletes using lactic acid fermentation.