@article{FuehnerGranacherGolleetal.2021,
  author    = {Thea Heidi F{\"u}hner and Urs Granacher and Kathleen Golle and Reinhold Kliegl},
  title     = {Age and sex effects in physical fitness components of 108,295 third graders including 515 primary schools and 9 cohorts},
  journal   = {Scientific Reports},
  volume    = {11},
  pages     = {1 -- 13},
  doi       = {10.1038/s41598-021-97000-4},
  year      = {2021},
}