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|Timing of Spermarche and Menarche are Associated with Physical Activity and Sedentary Behavior Among Korean Adolescents|
|Eun-Young Lee(University of Alberta) , Roman Pabayo(University of Nevada) , Ichiro Ka()|
Objectives: This study examined the timing of menarche and spermarche and
their associations with physical activity (PA) and sedentary behavior (SB) after
controlling for body mass index (BMI).
Methods: Multiple logistic regression analyses were conducted to determine
whether the timing of menarche in girls and spermarche in boys is associated
with PA and SB independent of BMI in a nationally representative sample of
Korean adolescents (13e18 years; NZ74,186).
Results: After controlling for age, family economic status, and BMI, early timing
of spermarche among boys was associated with a higher likelihood of engaging in
PA and a lower likelihood of engaging in SB for <2 hours during weekdays. By
contrast, boys with late timing of spermarche were less likely to engage in PA and
more likely to engage in SB for <2 hours. Among girls, early or late timing of
menarche was associated with a higher likelihood of engaging in PA and a lower
likelihood of engaging in SB.
Conclusion: Timing of menarche in girls and spermarche in boys could be a
marker for PA and SB among Korean adolescents. To promote PA and discourage
SB among Korean adolescents, school-based, grade-specific interventions can be
tailored by the absence or presence of menarche/spermarche.
|Osong Public Health and Research Perspectives, 7 (4)|