Question

when we are doing any work we need more oxygen and lactic acid is formed and we feel pain but when we get punishment and we keep on standing then why we feel pain in our legs? why not when sitting we feel pain?

Answer 1

When we are doing a work i.e in case of a physical activity the muscle cells respire anaerobically and produce lactic acid which gets deposited in the muscles. So the process of anaerobic respiration is responsible for the pain. The same will happen when we are in punishment and our muscles are stretched. When we are sitting our muscles are not stretched much so we feel no pain.