Music in the gym is one of the important factors in stimulating and motivating individuals to perform heavy workouts. This type of music can be a useful tool for improving athletic performance for many people. Some of the cases where gym music may be effective include:

- Nerve stimulation: Gym music can act as a stimulant for nerves and help you focus more and be ready for exercise.

- Increasing endurance: Gym music can help you tolerate more during exercise and therefore increase exercise time.

- Speeding up exercises: Gym music can help you perform your best during exercise and do exercises and stretches faster.

- Improving mental state: Gym music can help you have your best mental state during exercise and motivate you to achieve your goal.

Overall, gym music is one of the useful tools for improving athletic performance and increasing endurance over time.