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Longitudinal trends in physical activity and sedentary behaviour among school children in Norway: The health oriented pedagogical project (HOPP)
- Per Morten Fredriksen,
- Iana Kharlova,
- Maren Valand Hæhre,
- Asgeir Mamen
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- Published: April 8, 2026
- https://doi.org/10.1371/journal.pone.0345363