- Uitgroei van de ledematen, daarna de romp
(strekkingfase)
- Uitgroei in de breedte
(vullingsfase)
, * seksuele rijping
-
* Acceleratiefenomeen
= Jongeren vandaag maken een snellere ontwikkeling door dan enkele decennia geleden
- Seculiere groeiverschijving
15 cm/ 150 jaar
- Seksuele rijping
Meisjes: eerste menstruatie 3 jaar vroeger dan 150 jaar geleden start borstontwikkeling
Jongens: ‘ongevallenbult’ (accident hump) op jongeren leeftijd
Grote verschillen tussen jongeren in tijdstip van lichamelijke veranderingen.
Tussen landen en etnische groepen: socio- economisch factoren
Erfelijke factoren
Voedingstoestand (beter = vroeger)
Stress (meer = vroeger)
Lichaamstraining (sterk = later)
Gezinswarmte (meer = later)
Psychische problemen (meer = vroeger)
Gedragsproblemen (meer = vroeger)
IQ (lager = vroeger)
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