Effects of FIFA 11 + warm-up program on kinematics and proprioception in adolescent soccer players: a parallel‑group randomized control trial.

Knee injuries are common in youth soccer, and the FIFA 11+ warm-up program was developed partly to improve movement patterns thought to raise injury risk, such as excessive knee valgus (the knee collapsing inward) during cutting. This trial compared 8 weeks of the 11+ program against a standard warm-up in adolescent male and female players, looking at both cutting-maneuver movement patterns and joint position sense, a measure of proprioception (the body's sense of joint position) in the ankle and knee. The main finding was that female players who did the 11+ program showed less knee valgus during cutting compared to both control groups, but no other kinematic differences reached statistical significance. Joint position sense improved more in the 11+ groups than in controls for both sexes.

This suggests the program may sharpen proprioceptive awareness more consistently than it changes movement mechanics, and the authors suggest additional exercises might be needed to more broadly improve lower-limb alignment. The trial was small, with only 40 players split across four groups, limiting how confidently these results generalize.

Youth soccer players, especially girls, face a real risk of knee injuries, and warm-up programs like FIFA 11+ have been designed to help address this. This study looked at whether doing the 11+ warm-up for 8 weeks, compared to a regular warm-up, changed how young players moved during a cutting maneuver and how well they could sense the position of their ankle and knee joints, a skill called proprioception that helps with balance and control. The researchers found that female players who did the 11+ program showed improvement in one specific movement pattern, reduced inward knee collapse during cutting, compared to players in the control groups.

Other movement patterns did not show clear differences. Both male and female players who did the 11+ program showed better joint position sense than those in the control groups. This is encouraging but comes from a small study of 40 adolescent players, so it is hard to know how strongly these results would hold up in larger groups or different settings.

It also does not tell us whether these changes actually translate into fewer injuries.

This is a summary of research, not medical advice. Talk to your own healthcare provider about anything affecting your care.

For clinicians weighing whether the FIFA 11+ program meaningfully alters injury-relevant movement patterns in youth players, this trial offers a mixed but informative picture. Forty adolescent players, split by sex into four groups, completed either 8 weeks of the 11+ program or a standard warm-up, with outcomes assessed via motion analysis during a cutting maneuver and joint position sense testing at the ankle and knee using a digital inclinometer. The decisive finding is that knee valgus during cutting improved significantly only in female players who completed the 11+ program, compared to both female and male control groups, while no other kinematic variables reached significance.

This is a sex-specific and outcome-specific result rather than a broad kinematic improvement, and it should not be read as evidence that the program corrects movement mechanics generally. Joint position sense, however, improved across 11+ groups compared to controls, suggesting a more consistent proprioceptive effect that is distinct from, and not proof of, altered movement quality or reduced injury risk. The small sample size across four subgroups limits statistical power and generalizability, and the study does not report injury outcomes, so any link to actual injury prevention remains unestablished from this data alone.