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Ankle Joint

Ankle Joint

The ankle is formed by the talocrural joint (crural = leg). It consists of the articulations between the talus bone of the foot and the distal ends of the tibia and fibula of the leg. The superior aspect of the talus bone is square-shaped and has three areas of articulation. The top of the talus articulates with the inferior tibia. This is the portion of the ankle joint that carries the body weight between the leg and foot. The sides of the talus are firmly held in position by the articulations...

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Updated: Sep 10, 2025

Diagnosis of Musculus Gastrocnemius Tightness - Key Factors for the Clinical Examination

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Published on: July 7, 2016

Loading Rate in Single-Leg Drop Landing: Associations With Risk Factors for Ankle Sprain.

Yasushi Kurihara¹, Hironori Ohsugi¹, Yutaka Kuwae¹

¹Department of Physical Therapy, Faculty of Social Work Studies, Josai International University, Togane, JPN.

|August 22, 2025

Summary

This summary is machine-generated.

Higher loading rate during single-leg drop landings is linked to reduced joint motion and delayed muscle activation, increasing ankle sprain risk. This loading rate may identify individuals prone to ankle sprains.

Keywords:

ankle sprain loading rate lower limb joint angle peroneus longus parameter single-leg drop landing

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Last Updated: Sep 10, 2025

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Area of Science:

Biomechanics
Sports Medicine
Injury Prevention

Background:

Ankle sprains (AS) are common injuries, often linked to biomechanical factors during landing.
Understanding the relationship between landing mechanics and AS risk is crucial for developing effective prevention strategies.

Purpose of the Study:

To investigate the association between loading rate (LR) during single-leg drop landing (SDL) and biomechanical factors implicated in ankle sprains.
To determine if LR can serve as a predictive marker for ankle sprain risk.

Main Methods:

Seventeen healthy young men performed SDL from a 20-cm platform.
Three-dimensional motion analysis and force sensors captured landing kinematics and kinetics.
Musculoskeletal modeling software assessed peroneus longus muscle parameters.

Main Results:

Loading rate (LR) was negatively correlated with hip flexion, knee flexion, and ankle dorsiflexion.
A higher LR was positively correlated with delayed peroneus longus muscle activation timing.
Reduced sagittal plane joint motion and delayed muscle activation were associated with higher LR.

Conclusions:

Higher LR during SDL is associated with biomechanical factors contributing to ankle sprains, including reduced joint motion and delayed peroneus longus activation.
Loading rate may be a valuable clinical marker for identifying individuals at higher risk of ankle sprains.
These findings can inform targeted interventions for ankle sprain prevention.