More Chinese people aged 20 to 39 are becoming overweight and their athletic ability is declining, according to a national survey released on Monday.

The survey of more than 43,000 adults found that more than 11 percent of people aged 20 to 39 are obese, an increase of 2 percentage points since the last survey in 2010.

The average weight gain of the group was 1.92 kilograms, higher than figures of the other two age groups (40-59 and 60 plus).