During the Pan-Am competitions, some athletes have come off with some amazing expressions while exerting themselves.

Foto: Reuters/Getty Images

Cesar Cielo (Brazil) - Swimming


Foto: Reuters

Yadira Silva (Mexico)- Table Tennis

Foto: Getty Images

Laura Mota (Cuba)- modern pentathlon

Foto: Getty Images

Lucas Kanieski (Brazil)- Swimming

Foto: Satiro Sodré/Agif/Divulgação

Robert Margalis (USA)- Swimming


Foto: Reuters

Las Leonas (Argentina)- field hockey

Foto: Ivan Pacheco/Terra

Cesar Cielo (Brazil)- Swimming


Foto: Reuters

Cesar Cielo (Brazil) - Swimming


Foto: Reuters

Fabiana (Brazil) - volleyball


Foto: Reuters

Julio Cesar Campozano (Ecuador) - Tennis


Foto: EFE

Rafael Pascoa (Brazil) - wrestling

Foto: Ivan Pacheco/Terra

Marcelo Gomes (Brazil) - wrestling

Foto: Ivan Pacheco/Terra

Marcos Madrid (Mexico) - Table tennis


Foto: Reuters

Maria Abalo (Argentina) - Rowing


Foto: Reuters

Nidia Munoz (Cuba) - Taekwondo

Foto: Getty Images

Robert Mahoney (USA) - Swimming

Foto: Getty Images

Robert Mahoney (USA) - Swimming


Foto: Reuters

Shaune Fraser (Cayman Islands) - Swimming


Foto: AFP

Sheila (Brazil) - Volleyball

Foto: AP

Song Liu (Argentina) - Table tennis


Foto: Reuters

Xue Wu (Dominican Republic) - Table tennis


Foto: Reuters

Hugo Hoyama (Brazil) - Table tennis

Foto: Jefferson Bernardes / Vipcomm/Terra

Yarleen Santiago (Puerto Rico)- beach volleyball

Foto: Getty Images

Ricardo Mello (Brazil) - Tennis

Foto: Getty Images

Carla Rebecchi (Argentina) - field hockey

Foto: AP

Raelyn Prince (Canada) - Basketball

Foto: Getty Images

Ornella Santana (Argentina) - Basketball


Foto: Reuters

Synchronized swimming team (Brasil)

Foto: Ivan Pacheco/Terra

Megan Pinsker (Canada) - Basketball

Foto: Getty Images

Liu Song (Argentina) - Table tennis


Foto: Reuters

Irina Falconi (USA) - Tennis


Foto: Reuters

Emma Wolfram (Canada) - Basketball

Foto: Getty Images

Christine Flores (USA) - Basketball


Foto: Reuters

Emil Feuchtman (Chile) - Handball

Foto: Getty Images

Vanessa Jenny Mallqui (Peru) - Wrestling

Foto: Getty Images

Robert Farah (Colombia) - Tennis


Foto: EFE

Aline Ferreira (Brazil) - Wrestling

Foto: Getty Images