A national report indicates that Chinese kids have grown rapidly in both height and weight over the past 40 years, with experts calling for more exercise and sleep to ensure children develop healthily.

The National Health and Family Planning Commission released the Fifth National Children's Growth Report on Wednesday, which took 161,000 children nationwide under the age of 7 as the sample.

It found that both boys and girls had increased in both height and weight from 1975 to 2015. And the increases were most notable in the group aged between 6 and 7.