Patterns during drop vertical jump in chronic ankle instability and lateral ankle sprain copers
Earlier, the drop vertical jump (DVJ) task has been used to portray movement patterns related to a number of injury types. But, no current research prevails evaluating people with chronic ankle instability (CAI) compared with people coping with lateral ankle sprain (LAS) (LAS copers).
A study was done to disseminate the coping movement and motor control patterns of LAS copers in comparison with individuals with CAI during the DVJ task. Total 70 individuals were employed at convenience within 2-weeks of sustaining a first-time acute LAS injury. One year after employment, they were divided into 2 groups: 28 with CAI and 42 LAS copers. They attended the testing laboratory to accomplish a DVJ task. To determine the lower extremity joints of both limbs for the drop jump phase (phase 1) and drop landing phase (phase 2) of the DVJ, a three-dimensional kinematic and sagittal-plane kinetic profiles were plotted. The rate of impact modulation relative to body weight during both phases of the DVJ also was governed.
Results showed that participants with CAI displayed remarkable elevation in hip flexion on their “involved” limb during phase 1 of DVJ (23° vs 18°) and bilaterally during phase 2 (15° vs 10°) than LAS copers. These patterns concurred with altered moment-of-force patterns at the hip on “uninvolved” limb.
It is unknown whether these movement and motor control patterns preceded or occurred as a consequence of the initial LAS injury. During a DVJ task compared with LAS copers, participants with CAI exhibited hip-centered changes in movement and motor control patterns. The explorations from this study may give an evidence of the coping mechanism underlying outcome after initial LAS injury.