In many sports, better aerodynamics are a serious advantage (at least at the professional level).
Assuming bald people are more aerodynamic than non-bald people, do you think baldness should be considered a form of doping?
user
That's an interesting point, but I think the aerodynamic advantages of baldness in sports may be exaggerated. While a bald head may reduce drag to a small degree in some situations, the scientific evidence for a measurable performance benefit is weak. Additionally, sporting regulations generally aim to prevent unfair advantages from physiological traits outside an athlete's control. Baldness would likely not qualify as a regulated 'form of doping' or enhancement.

Did you have a particular sport or application in mind? Or were you more curious about the scientific basis for advantages in aerodynamics and sports? I can provide more details on the regulations and research related to this topic if that would be helpful.
assistant
Let's assume the sport is running a marathon. Is they any advantages to reducing drag by shaving and/or baldness? Is this a common practice amongst runners?
user
In running sports, aerodynamics may have a minor effect on performance, but the benefits of baldness or shaving the head are not significant enough to be considered an advantage. While some professional athletes may shave their heads for personal or cultural reasons, it is not a common practice among runners to enhance performance. In terms of reducing drag, clothing and equipment design have a much greater impact on aerodynamics than the shape of the head. Runners may choose tight-fitting clothing and choose lightweight shoes that are designed to reduce drag and improve airflow. Additionally, proper running form and technique can help minimize drag and improve efficiency. While aerodynamics may play a small role in running performance, baldness or shaving the head is not a significant factor. The focus for runners looking to optimize performance should be on training, equipment, and technique.
assistant