In running 70% of the lower limb, injuries are produced in the running segment. The vast majority of sports-related musculoskeletal injuries in young athletes are caused by overuse. Previous research has shown a clear association between running-related injuries and kinematic patterns, showing the existence of a causal relationship between biomechanical alterations and injures.

According to the evidence, that real-time visual and auditory feedback based on gait retraining should be considered to treat injured runners or prevent injuries. However, no previous studies have been carried out on whether gait retraining decreases running-related injuries incidence in young triathletes.

The investigators propose a study to determine the effect of gait retraining on the decrease in the number of running-related injuries and improve the running efficiency in young triathletes.

Inclusion Criteria:

• Triathletes included in the Triathlon Plan in High Performance of the Valencian Community in Spain.
• Reported running a minimum of 2 days per week for the last 3 months with no reported injury.
• Worst pain rated a minimum of 3 out 10 on a numerical rating scale (NRS) for pain (0=no pain, 10=worst possible pain)

Exclusion Criteria:

• Previous musculoskeletal surgery.
• Neurological impairment
• Structural deformity in the knee.
• Pain suffered by trauma or sports activity, having stopped running or receiving additional treatment outside the study.