The first point is that listening to music can help us block out external noises, including music that we may not like at the gym sometimes, and the voices of other people chatting.
We should understand that our concentration is closely related to our performance in fitness, especially strength training, and is in direct proportion.
Therefore, when we shield the external noise, we can concentrate more on outputting our own strength and completing our actions. That's why we can see some people wearing headphones even though they are dead.
The second point is that listening to music can help us get into the state better. We need to know how we perform in fitness. It depends not only on our muscle mass, but also on whether our nervous system is activated and how perfect it is.
When fighting, the heart beats faster and the blood intensifies because our nerves are activated, so we will immediately enter the state. In this respect, music can help us to a great extent.
The third influence is that when our training becomes very difficult, music can often give us a push and help us break through. This is most common in strength training or when we break our limit weight. Maybe we can't do this weight ourselves.