title: Performance enhancement effects of Fédération Internationale de Football Association's "The 11+" injury prevention training program in youth futsal players.
abstract: OBJECTIVE
  To evaluate if Fédération Internationale de Football Association's "The 11+" injury prevention program improves physical fitness and technical performance in youth futsal players.
  
  
  METHODS
  Randomized cohort study.
  
  
  METHODS
  Futsal club.
  
  
  METHODS
  Thirty-six futsal players (17.3 ± 0.7 years).
  
  
  METHODS
  Players were randomized to an intervention group (n = 18) or a control group (n = 18). Intervention group performed "The 11+" twice per week for 12 weeks.
  
  
  METHODS
  Isokinetic testing to access maximal quadriceps (Q) and hamstring (H) strength, vertical jump (squat jump, SJ; countermovement jump, CMJ), 5-m and 30-m sprint, agility, slalom, and balance performances were also measured.
  
  
  RESULTS
  Intervention group increased (P < 0.05) quadriceps concentric (14.7%-27.3%) and hamstrings concentric (9.3%-13.3%) and eccentric (12.7%) peak torque. Intervention group improved functional H:Q ratio by 1.8% to 8.5% (P < 0.05). Intervention group improved (P < 0.05) SJ (13.8%) and CMJ (9.9%) and 5-m and 30-m sprint (8.9% and 3.3%, respectively), agility (4.7%), and slalom (4.8%) performances. Intervention group also improved balance, by decreasing the number of falls by 30% in the nondominant limb. No changes were observed in control group.
  
  
  CONCLUSIONS
  The results suggest that 'The 11+' can be used as an effective conditioning means for improving physical fitness and technical performance of youth futsal players.
authors.affiliation: Centre of Research, Education, Innovation and Intervention in Sport, Faculty of Sport, University of Porto, Porto, Portugal.
authors.forename: Ivan
authors.initials: I
authors.lastname: Reis
authors.forename: António
authors.initials: A
authors.lastname: Rebelo
authors.forename: Peter
authors.initials: P
authors.lastname: Krustrup
authors.forename: João
authors.initials: J
authors.lastname: Brito
mesh_terms: D000293:Adolescent; D001265:Athletic Injuries / Q000517:prevention & control*; D006801:Humans; D008297:Male; D064797:Physical Conditioning, Human; D013177:Sports / Q000502:physiology*