For a fit athlete such as Australian swimmer James Magnussen, the idea of subjecting his body to the physical strain and doping allowed by the new Enhanced Games initiative is not something that worries him.

The global computer glitch that hit airlines, banks and major companies on Friday could not have come at a worse time for the organisation of a Games: the days when athletes are arriving in the Olympic Village ahead of next week's opening ceremony.

The strict security measures are significantly impacting economic activity in Paris, causing a sharp decline in sales for local shops and restaurants, according to unions.

This week, Paris introduced a dedicated lane to streamline access to Olympic venues, which has been closed to regular traffic. Since its opening on Monday, July 15, 400 fines have already been issued.