The increase is partly down to 100,000 female condoms being made available for the first time, along with 350,000 condoms for men.  

About 175,000 packets of lubricant are also being supplied.

Brazilian newspaper Folha de São Paulo claims the increase isn’t related to Zika, the health scare which has caused Rio 2016 organisers a major headache ahead of the Opening Ceremony on August 5.

The virus is most commonly known as one transmitted by mosquitoes, however, it can also be transmitted sexually.

The International Olympic Committee (IOC) said the condoms would encourage 10,500 athletes and staff to practice safe sex.

They will be distributed free from a clinic in the Athletes’ Village, which opens on July 24, or from vending machines.

It was announced earlier this month that Australia's Olympic athletes will be given extra-protective condoms to guard them from Zika at Rio 2016.

The "Dual Protect Viva Gel" condoms contain a special lubricant which acts as an antiviral agent.

The condoms, to be provided by Starpharma Holdings and Ansell Limited, are said to be a world first.

Laboratory tests showed near-complete protection against Zika with the antiviral agent also said to "inactivate" HIV, genital herpes and HPV, all of which are viruses that can cause sexually transmitted infections.

Dr David Hughes, the medical director for Australia's team, said the risk of Zika was "minimal" but the country is taking no chances.

Other scientists have suggested postponing the Games due to the health risk, however, with the virus prominent in the Americas.

Pregnant women are at particular risk due to a link with birth defect microcephaly.

This causes babies to be born with small heads and under-developed brains, while Zika can also cause miscarriages, premature birth and vision problems in babies.

World Health Organization advice, which is being followed by the IOC and Rio 2016 organisers, is for women who are pregnant to not attend the Games.

Durex provided free condoms for athletes at London 2012.