results: “Regarding girls, only for the entire sample, these is a secular decrease in the duration of physical inactivity”: This is unclear: girls versus entire sample? • This has now been amended. This sentence has now been clarified (pp. 2-3). Abstract: conclusions: younger cohort (1998-2000): should this not be (2008-2010)? • This has now been amended (p. 3, Line 7). conclusions: younger coh...
