Pataxo etnia group prepare before  run in a "Tora" race, where they carry tree logs that weigh up to
100 kg (220 lbs), at the I World Indigenous Games in Palmas Brasil, Oct. 24, 2015. (Photo/W MARTINEZ)

Women of Kayapo etnia group from Brazil pull on the rope during the tug of war competition
at The I World  Indigenous Games in I World Indigenous Games Palmas Brasil, Oct. 25, 2015.
(Photo/W MARTINEZ)

An Brazilian Kayapo Indian takes part in the spear throwing competition at the World Indigenous
Games, in Palmascompetition at The I World Indigenous Games Palmas Brazil, Tuesday, Oct. 27, 2015. (Photo/W MARTINEZ)

Indian woman from Brazil crosses as wins  the finish line 100m relay at The I World Indigenous Games  Palmas Brazil, Monday,  Oct. 26, 2015. (Photo/W MARTINEZ)

A member of Brazil's Xavante indigenous community aims his arrow at organizers of the World Indigenous Games during protest against a proposed constitutional amendment that would put the demarcation of indigenous lands into the hands of the Congress in Palmas, Brazil, Oct. 28, 2015. (Photo/W MARTINEZ)

Pataxo Indian with his body painted, protest against the proposed amendment to the Brazilian constitution that would change the rules of demarcation of indigenous lands, at Arena Stadium  during the World Indigenous Games, in Palmas, Brazil, Tuesday, Oct. 27, 2015. Native Brazilians represent around two dozen of the continent-sized country’s more than 300 tribes make up the lion’s share of participants at the Games, and their problems have taken center stage at the event. (PHOTO/W.MARTINEZ)

Pataxo men watch a soccer match against a fellow Brazilian tribe, Xerente, during the World Indigenous Games, in Palmas, Brazil, Friday, Oct. 23, 2015. Hundreds of indigenous people from across Brazil and delegations from as far afield as Mongolia and the Philippines have already arrived for what has been billed as the first indigenous Olympics. Palmas, Brasil, Oct. 23, 2015. (Photo/W MARTINEZ)