Measurement of pelvic movements during the vertical jump to assess the risk of injury in a soccer player with reconstructed anterior cruciate ligament

Author: Doctor Paolo Pirozzi


19-year-old patient, amateur soccer athlete, operated for reconstruction of the anterior cruciate ligament of the left knee with withdrawal from the patellar tendon in 2018, clinical history of multiple ankle sprains.

Test with Baiobit

At the beginning of the sports season, the athlete undergoes a physiotherapy assessment based on movement analysis in order to assess the degree of injury risk and set up a personalized prevention program. For this reason, we evaluated the two-foot vertical jump through a measurement of both the squat jump (jump without counter-movement) and the counter-movement jump (jump with counter-movement).


During both the counter-movement jump and the non-counter-movement jump, there was a pelvic tilt range of approximately 43 degrees to the right. Furthermore, the same pelvis had a greater average angle of inclination at the moment of landing rather than during the take-off phase: more specifically, during the jump with counter-movement the pelvic tilt was 0 ° at take-off and 11 ° all ‘landing, while during the jump without counter-movement the pelvic tilt was 0 ° at take-off and 6 ° at landing.

Further Results

In addition to the measurement of pelvic movements, the two vertical jump tests showed another important data from a preventive point of view: all parameters of strength, power, speed are higher during the squat jump rather than during the counter-movement jump. These data testify to the fact that the footballer has a deficit in the management and use of the muscular explosive elastic force, relying more on static muscular strength.

Rehabilitation Program

The objectives of the prevention program are two:

Improving the neuromotor control of the “core” during the two-breech and mono-breech jumping phases through specific exercises to activate the abdominal, lumbar and gluteal muscles

Improve the ability to use the elastic component of the muscle-tendon system through a specific progressive plyometric training

Exercises with Baiobit

Continuous measurement of pelvic movements and strength, power and speed developed during jumps.


Jump evaluation with bipodalic countermovement: 

Jump evaluation without bipodalic countermovement


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