1. Kohei Uchimura, Japan - Gymnastics
2. Erika Fasana, Italy - Gymnastics
3. Unidentified, Japan - Gymnastics
4. Aliya Mustafina, Russia - Gymnastics
5. Vanessa Ferrari, Italy - Gymnastics
6. Mc Kayla Maroney, United States - Gymnastics
7. Unidentified - Gymnastics
Gymnasts use honey mixed with chalk for a better grip during bar routines.
8. Yoshie Ueno, Japan and Marijana Miskovic, Croatia - Judo
9. Daniel Williams, England - Judo
10. Jennifer Kessy, United States - Beach Volleyball
As you can see, working barefoot on sand has obvious aesthetic benefits.