It is "no wonder" more athletes went to private schools than state funded facilities, as they have better access to sports equipment and playing fields, the head of an inner city school told Good Morning Britain.
Serge Cefai, head of London's Sacred Heart School, said it was unfair parents were threatened with arrest if their child was obese and school meals were "micro-managed" while state school pupils were denied access to playing fields.
Schools which do not offer pupils the chance to play competitive sport "cement the social inequality that holds our nation back", the head of Ofsted has said.
Sir Michael Wilshaw, who is due to present a report into sports teaching in state and private schools at the Festival of Education at Wellington College, said:
Heads who treat competitive sport with suspicion or as an optional extra are not only denying youngsters the clear dividends that come with encouraging them to compete, they are also cementing the social inequality that holds our nation back.
More state schools are now encouraging sporting excellence.
They use competitive schools sport to energise the entire school culture.
They demonstrate that high school fees and large playing fields are not a pre-requisite to success.
Ofsted has warned that too many pupils are being denied the chance to take part in competitive sport by state schools who treat it as an "optional extra".
In a new report, the Chief Inspector of School said children's education was poorer if they were deprived of the chance to compete.
Sir Michael Wilshaw suggested that many state schools were failing to offer good quality competitive sport when it should be seen as key to helping boost children's results in the classroom and exam hall.
Ofsted's new report, commissioned after the 2012 London Olympics, examined why so many winning athletes come from private schools rather than the state sector, and the links between the quality of competitive school sport and sporting success later in life.