In fact, the principle of physical pain caused by doing too many push-ups is the same as the pain that we will regress after running for a long time suddenly, because a lot of exercise will make our body produce lactic acid, which will make us feel unbearable if it does not dissipate. In this case, we usually massage or rub the sore parts of our legs with our hands, and then we will feel much more relaxed. This is because the lactic acid in our body is diffused by us.
When we feel backache after doing push-ups, but we can't rub it well, we can ask our friends to help us rub it properly to help the lactic acid in our back dissipate. In the meantime, we can take a hot bath when we get home. Taking a hot bath can raise our body temperature and improve our blood circulation, thus accelerating the diffusion and reduction of lactic acid in our body and helping us to alleviate this unbearable feeling.
In fact, feeling sore after exercise often happens. In general, it is because we have accumulated lactic acid in our bodies, but it does not rule out that we are injured, because doing exercise is inherently risky. For example, when we split, we often talk about ligament strain and feel unbearable pain. Therefore, when doing exercise, we'd better choose exercise reasonably and exercise moderately, otherwise it may do harm to our health.