Girls dance before the start of an arm wrestling competition in the crowded Medina district of Dakar, Senegal, May 12, 2013. The "Jaay Doole," which translated from Wolof means "Show Your Strength", is a competition that aims to find the best arm wrestler in Senegal by holding tournaments throughout the country. Picture taken May 12, 2013. REUTERS/Joe Penney (SENEGAL - Tags: SOCIETY) 

Singer Doudou Ndiaye performs during an arm wrestling competition in the crowded Medina district of Dakar, Senegal, May 12, 2013. The "Jaay Doole," which translated from Wolof means "Show Your Strength", is a competition that aims to find the best arm wrestler in Senegal by holding tournaments throughout the country. Picture taken May 12, 2013. REUTERS/Joe Penney (SENEGAL - Tags: SOCIETY) 

Revellers watch an arm wrestling competition in the Medina district of Dakar, Senegal, May 12, 2013. The "Jaay Doole," which translated from Wolof means "Show Your Strength", is a competition that aims to find the best arm wrestler in Senegal by holding tournaments throughout the country. Picture taken May 12, 2013. REUTERS/Joe Penney (SENEGAL - Tags: SOCIETY) 

Fans cheer during an arm wrestling competition in the Medina district of Dakar, Senegal, May 12, 2013. The "Jaay Doole," which translated from Wolof means "Show Your Strength", is a competition that aims to find the best arm wrestler in Senegal by holding tournaments throughout the country. Picture taken May 12, 2013. REUTERS/Joe Penney (SENEGAL - Tags: SOCIETY) 

A child watches an arm wrestling competition in the crowded Medina district of Dakar, Senegal, May 12, 2013. The "Jaay Doole," which translated from Wolof means "Show Your Strength", is a competition that aims to find the best arm wrestler in Senegal by holding tournaments throughout the country. Picture taken May 12, 2013. REUTERS/Joe Penney (SENEGAL - Tags: SOCIETY) 

An entertainer looks on before the start of an arm wrestling competition in the crowded Medina district of Dakar, Senegal, May 12, 2013. The "Jaay Doole," which translated from Wolof means "Show Your Strength", is a competition that aims to find the best arm wrestler in Senegal by holding tournaments throughout the country. Picture taken May 12, 2013. REUTERS/Joe Penney (SENEGAL - Tags: SOCIETY TPX IMAGES OF THE DAY)