title: [Effect of an 8-week aerobic training program during physical education lessons on aerobic fitness in adolescents].
abstract: OBJECTIVE
  To determine the effect of a high intensity aerobic training program of 8 weeks, developed during physical education classes, on the aerobic capacity of adolescents aged 15 to 18 years.
  
  
  METHODS
  A total of 84 adolescents (51 boys and 33 girls) participated in this study. The aerobic capacity (VO(2)max) was measured directly with a portable gas analyzer (K4b², Cosmed) during the performance of the 20 Meters Shuttle Run Test (20mSRT). The sample was divided into 2 experimental groups (G2S and G3S) and 1 control group. The training program was composed of aerobic physical activity (75-80% VO(2)max.). The G2S developed 2 sessions per week while the G3S made 3.
  
  
  RESULTS
  The G2S increased VO(2)max (boys: from 55.7 to 56.6 ml/kg/min; girls: from 37.8 to 38.7 ml/kg/min; p < 0.001) and the number of stages in the 20mSRT (9.0% boys, p < 0.001; 20.0% girls, p < 0.001). The G3S also increased VO(2)max (boys: from 54.9 to 56.0 ml/kg/min; girls: from 36.0 to 38.7 ml/kg/min) and the number stages in the 20mSRT (10.4% boys, p < 0.001; 32.3% girls, p < 0.001). In G2S and G3s, girls showed greater improvement than boys.
  
  
  CONCLUSIONS
  A high intensity aerobic training program developed during 8 weeks, 2 sessions per week, improves aerobic capacity of the students. An extra session of intense exercise for week is a greater improvement in girls, but do not produce such effects in boys.
authors.affiliation: Department of Sport and Informatics, University Pablo de Olavide, Seville, Spain.
authors.forename: J
authors.initials: J
authors.lastname: Ramírez Lechuga
authors.forename: J J
authors.initials: JJ
authors.lastname: Muros Molina
authors.forename: J
authors.initials: J
authors.lastname: Morente Sánchez
authors.forename: C
authors.initials: C
authors.lastname: Sánchez Muñoz
authors.forename: P
authors.initials: P
authors.lastname: Femia Marzo
authors.forename: M
authors.initials: M
authors.lastname: Zabala Díaz
mesh_terms: D000293:Adolescent; D015308:Anaerobic Threshold; D001784:Blood Gas Analysis; D015444:Exercise / Q000502:physiology*; D005260:Female; D006801:Humans; D008297:Male; D010806:Physical Education and Training / Q000379:methods*; D010809:Physical Fitness / Q000502:physiology*; D012420:Running / Q000502:physiology; D012727:Sex Characteristics