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Objective: To evaluate if Federation Internationale de Football Association's "The 11 " injury prevention program improves physical fitness and technical performance in youth futsal players.

Design: Randomized cohort study.

Setting: Futsal club.

Participants: Thirty-six futsal players (17.3 /- 0.7 years).

Intervention: 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.

Main Outcome Measures: 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.

(C) 2013 by Lippincott Williams & Wilkins