  Objectives: This study analyzed adolescent physical activity, its link to
overweight, and the social network structure in group sports participants,
focusing on centrality measures.
  Setting: Conducted in 11 classrooms across 5 schools in Ponferrada, Spain.
  Participants: Included 235 adolescents (49.4% female), categorized as normal
weight or overweight.
  Methods: The Physical Activity Questionnaire for Adolescents (PAQ-A) assessed
physical activity levels. Social network analysis evaluated centrality in
varying contact degrees.
  Results: 30.2% were overweight. Males scored higher in PAQ-A and were more
likely to engage in group sports. No significant correlation was found between
physical activity and weight in the total sample. However, overweight females
reported higher exercise levels. Centrality analysis showed gender differences;
women in group sports had lower centrality, whereas men had higher.
  Conclusions: The study highlights the importance of gender and social network
centrality in designing future strategies, considering peer interaction
intensity
