Double Olympic champion Alistair Brownlee says the prospect of winning two more gold medals at the Tokyo 2020 Olympics could tempt him to commit to his fourth consecutive Games.

The International Olympic Committee's executive board meets in Lausanne on Friday to ratify a host of additions to the new Olympic programme, including the triathlon mixed relay.

The 29-year-old Brownlee has shifted his focus towards longer "Ironman" events since retaining his Olympic triathlon title in Rio, and has remained non-committal over going to Tokyo.

But Brownlee admitted the possibility of going to Japan in search of both a third straight individual title and a mixed relay gold alongside brother Jonny could tip the balance.

"The decision (on the mixed relay) is pretty imminent and it's a big deal," said Brownlee.

"With the potential to win two more Olympic gold medals, that could have quite a big bearing on what I decide to do about Tokyo. It could definitely tempt me back."

Brownlee marked his long-distance debut with victory in Gran Canaria last month, and will make a temporary return to the shorter distance in the Leeds World Series this weekend.

He added: "I'm concentrating on the longer distances at the moment but it was just impossible to resist competing again in my home city.

"The training schedule is not all that different but it remains to be seen what effect my focus on the longer races is going to have on the Olympic distance."

Brownlee's team-mate, former world champion Non Stanford, said she would also welcome the introduction of a mixed relay to the Olympic programme.

Stanford, who finished fourth in Rio behind her then-housemate Vicky Holland, said: "It would be absolutely fantastic for the sport because it's one of our showpiece events.

"In many sports there is gender inequality and it is exciting to be a part of a sport that really values equality and really pushes for it."

A series of other changes are being considered by the IOC including the potential introduction of parkour, three-on-three basketball, freestyle BMX and high diving.

Parkour, or freerunning, is a fast-growing sport based on moves developed to complete military obstacle courses. It is undeniably acrobatic but traditionalists may wonder how it fits into a more formal gymnastics programme, and some in the parkour community have claimed the International Federation of Gymnastics and IOC are trying to hijack the sport.

Most existing Olympic sports, however, are eager to borrow some of parkour's popularity with young audiences, and several, including modern pentathlon, swimming and table tennis, want to bring in mixed team events and more relays - a move IOC president Thomas Bach believes can promote women's sport.

This means removing existing events, as the IOC wants to keep a cap on the total number of athletes at a Games and the medals available. More than 11,000 athletes competed in 306 different events in Rio and those numbers are set to increase to approximately 12,000 and 324 in Tokyo.

So canoeing is proposing to drop the C2 slalom and two sprint events to find room for three female races, rowing is scrapping the lightweight men's four for an open-weight women's event and shooting wants to swap the men's 50metre rifle prone, 50m pistol and double trap for three mixed team events.

Archery, judo, synchronised swimming, taekwondo and triathlon also have plans to promote gender equality with new events, while boxing and weightlifting would like more weight categories and cycling wants to return the madison to the track programme, with men's and women's races.