People, who for a long time remained in hypodynamic state, develop intense pain in the muscles after a physical exertion. What is the most likely cause of this pain?

Answer options

1. Increased content of ADP in muscles
2. Accumulation of lactic acid in muscles
3. Accumulation of creatinine in muscles
4. Intensive breakdown of muscle proteins
5. Decreased content of lipids in muscles

Explanation

Muscle pain is due to lactate accumulation, during anaerobic glycolysis glucose is converted to lactate to produce ATP, in a lack of O2.