Official Scottish Government statistics show variation by area - when it comes to meeting the target of two periods - or 100 minutes of PE in secondary schools per week.
The worst performing local authority is West Dunbartonshire, which has fallen from 80 per cent last year to just 60 per cent in 2016.
And in Angus the figure has dropped from 100 per cent in 2015 to just 88 per cent in 2016.
There has also been a notable decrease in the city of Edinburgh from 100 per cent last year to just 96 per cent this year and in Perth and Kinross the figure has also fallen from 100 per cent to 90 per cent.
In the Falkirk area there has been no improvement on the target from 2015 and the figure remains the same at 63 per cent, and in Highland there has been no improvement at just 93 per cent.
Scottish Conservative sport spokesman Brian Whittle said:
“These figures show a postcode lottery when it comes to young people getting the sport and exercise they need.
“Every young person should have the same amount of physical activity available to them but many areas are being short changed on quality PE lessons.
“The SNP government say that sport and PE are an essential part of education in ensuring Scotland becomes a healthier nation – so why are some pupils missing out?
“We must ensure that opportunity for all means exactly that with a greater emphasis put on PE and physical literacy in our schools. More effort needs to be targeted to supporting our PE teachers and ensuring there are sufficient numbers to cover lessons.
“If Scotland wants to produce sporting stars of the future and keep their young people fit then the SNP needs to concentrate on delivering the target in all local authority areas as a matter of priority.”