Collisions lead to different outcomes depending on the situation. In sports, physical contact helps clear the mind and improve skills, whereas intentional shoulder bumps in crowded public spaces cause discomfort to others and invite social criticism. As of today, we will examine these two sides in detail through the phenomenon of youth wrestling, the Japanese “butsukari” controversy, and the experiences of professional athletes.
The Two Faces of Collision: Sports Growth and Subway Etiquette

1. Why Does Colliding in Sports Clear the Mind?

According to an article on the Youth Sports Festival wrestling band, athletes stated that colliding with their bodies makes their minds feel clear. This is because physical contact stimulates proprioception, relaxing muscle tension and sending focus signals to the brain. In actual training, repeated collisions promote adrenaline secretion, increasing alertness and reducing distracting thoughts. As a result, athletes can approach the next technique practice with a clearer mind after training.
Controlled physical contact in sports helps clear the mind and enhance concentration.
2. Butsukari in the Subway: When Does It Become a Problem?

“Butsukari” is derived from the Japanese word “butsukaru,” meaning an intentional shoulder bump, and is frequently observed in crowded subway stations or streets. According to news reports, this behavior mainly occurs during peak commuting hours when there are many passengers, and in some cases, it is repeated targeting specific groups. Victims experience physical discomfort and psychological stress due to the sudden contact. Socially, this is considered a violation of public etiquette and becomes a target of criticism online.
Intentional shoulder bumps in crowded public spaces cause discomfort to others and are socially criticized.
3. How Do Professional Athletes Utilize Collisions?

Park Ji-hyun, who plays in the WNBA, said that colliding with many good players was very helpful today. This means that physical collisions with higher-level players provide technical feedback and help quickly identify weaknesses. In actual games, physical battles with strong opponents serve as opportunities to train balance and strength control. Therefore, professional athletes do not avoid collisions but use them strategically as a driving force for growth.
Physical collisions with higher-level players become valuable feedback for technical improvement and mental strengthening.
4. Three Ways to Turn Collisions into Positive Experiences in Daily Life
First, experience controlled physical contact through regular sports or martial arts training. Participating in wrestling or judo classes twice a week can sharpen your senses through impacts familiar to your body. Second, when using public transportation, respect personal space and avoid intentional contact. Maintaining distance from the person in front and standing straight when boarding can reduce meaningless collisions. Third, if a collision occurs, apologize immediately and observe the other person’s reaction. If you accidentally touch someone’s shoulder in a crowded elevator, briefly say “I’m sorry” and move on.
Resolve unintentional contact with apologies, avoid intentional contact, and use controlled collisions in sports for growth.