The study has investigated the effects of adding change of direction (COD) training to the FIFA 11+ on lower extremity performance in soccer players. The investigators are interested in knee valgus angle during cutting which is typically suggested as a critical risk of anterior cruciate ligament injury. Peak knee valgus angle during cutting is expected to reduce immediately after adding COD training to the FIFA 11+.

Inclusion Criteria:

• Soccer players

Exclusion Criteria:

• Having experience of serious injury such as, ACL injury and chronic ankle instability
• Having experience of lower limb surgery such as, bone fracture, tendon rupture, or ligament rupture
• Having current musculoskeletal injuries such as, muscle sprain
• Attending other prevention program or similar study especially on lower extremity
• Soccer player who are unable to perform level 3 of part 2 of the FIFA 11+ prevention program

We will consider in the future.