2015 World Masters Athletics Championships is the 21st in a series of World Masters Athletics Outdoor Championshipsthat took place in Lyon, France from 4 to 16 August 2015.This was the last odd year of the biennial Championships; beginning in 2016, the Championships will be held in even-numbered years.The change was made to avoid conflict with the quadrennial World Masters Games, which had been held in odd-numbered years since 2005. The WMA is the global governing body of the sport of athletics for athletes 35 years of age or older, setting rules for masters athletics competition.