The two-time Olympic gold medalist has not competed since winning her third world championship title in Moscow in 2013, taking time out to have her first child. Her daughter was born in June 2014.

On Tuesday, Moscow's CSKA athletics club celebrated "the return of an Olympic champion," adding that Isinbayeva would compete for the club and work as an "instructor."

In comments reported by the Tass agency, Isinbayeva said she would focus on fitness training for the rest of 2015 before starting to vault next year, with the aim of competing at her fourth Olympics.

Isinbayeva vaulted a world record 5.06 meters in 2009.

--Sapa-AP--