Analysis of Impact Forces in the Vertical Jump

The Challenge

The client required a precise understanding of the shock absorption mechanism at the level of the lower limbs, to identify critical points of overloading that lead to an increased risk of injury. Existing empirical data was limited and did not provide a complete dynamic perspective on force distribution.

Our Approach

We implemented a hybrid methodology, combining:

• Optoelectronic motion capture with 12 high-speed cameras for kinematic tracking.
• Synchronized force platforms for measuring ground reaction.
• Parametric modeling of body segments in finite element software for structural response simulation.
• Data analysis was focused on the eccentric phase of landing, where deceleration forces peak.

Implementation & Results

The process generated a dynamic model capable of predicting with over 94% accuracy the stress distribution in the patellar ligament and meniscus. The data highlighted an unexpected concentration of stress in the posterior knee area, with forces of up to 8x body weight under maximal jump conditions. These findings led to a redefinition of the training protocol to integrate hamstring strengthening exercises.