Related Experiment Video
Updated: Jan 5, 2026
Evaluating Postural Control and Lower-extremity Muscle Activation in Individuals with Chronic Ankle Instability
Published on: September 18, 2020
Hop-Stabilization Training and Landing Biomechanics in Athletes With Chronic Ankle Instability: A Randomized
Mohammad Karimizadeh Ardakani1, Erik A Wikstrom2, Hooman Minoonejad1
1Department of Health and Sport Medicine, Faculty of Physical Education and Sport Sciences, University of Tehran, Iran.
Context:
Hopping exercises are recommended as a functional training tool to prevent lower limb injury, but their effects on lower extremity biomechanics in those with chronic ankle instability (CAI) are unclear.
Objective:
To determine if jump-landing biomechanics change after a hop-stabilization intervention.
Design:
Randomized controlled clinical trial.
Setting:
Research laboratory.
Patients Or Other Participants:
Twenty-eight male collegiate basketball players with CAI were divided into 2 groups: hop-training group (age = 22.78 ± 3.09 years, mass = 82.59 ± 9.51 kg, height = 187.96 ± 7.93 cm) and control group (age = 22.57 ± 2.76 years, mass = 78.35 ± 7.02 kg, height = 185.69 ± 7.28 cm).
Intervention(S):
A 6-week supervised hop-stabilization training program that consisted of 18 training sessions.
Main Outcome Measure(S):
Lower extremity kinetics and kinematics during a jump-landing task and self-reported function were assessed before and after the 6-week training program.
Results:
The hop-stabilization program resulted in improved self-reported function (P < .05), larger sagittal-plane hip- and knee-flexion angles, and greater ankle dorsiflexion (P < .05) relative to the control group. Reduced frontal-plane joint angles at the hip, knee, and ankle as well as decreased ground reaction forces and a longer time to peak ground reaction forces were observed in the hopping group compared with the control group after the intervention (P < .05).
Conclusions:
The 6-week hop-stabilization training program altered jump-landing biomechanics in male collegiate basketball players with CAI. These results may provide a potential mechanistic explanation for improvements in patient-reported outcomes and reductions in injury risk after ankle-sprain rehabilitation programs that incorporate hop-stabilization exercises.
