Dorsiflexion deficit during jogging with chronic ankle instability.
The purpose of the study was to determine whether individuals with chronic ankle instability (CAI) demonstrate altered dorsiflexion/plantar flexion range of motion (ROM) compared to controls during jogging. The case control study took place in a university motion analysis laboratory. Fourteen volunteers participated in the study, seven suffered from CAI (age 25+/-4.2 years, height 173+/-9.4 cm, mass 71+/-8.1kg) and seven were healthy, matched controls (age 25+/-4.5 years, height 168+/-5.9 cm, mass 67+/-9.8kg). All subjects jogged on an instrumented treadmill while a ten-camera motion analysis system collected three-dimensional kinematics of the lower extremities. The main outcome measure was sagittal plane (dorsiflexion/plantar flexion) range of motion of the ankle throughout the gait cycle. CAI subjects had significantly less dorsiflexion compared to the control group from 9% to 25% during jogging (4.83+/-0.55 degrees ). CAI subjects demonstrated limited ankle dorsiflexion ROM during the time of maximal dorsiflexion during jogging. Limited dorsiflexion ROM during gait among individuals with CAI may be a risk factor for recurrent ankle sprains. These deficits should be treated appropriately by rehabilitation clinicians.
University of Virginia, Department of Kinesiology, United States. LKD4D@virginia.edu
Lindsay K
LK
Drewes
Patrick O
PO
McKeon
D Casey
DC
Kerrigan
Jay
J
Hertel
D000328:Adult; D000843:Ankle Joint / Q000503:physiopathology*; D001696:Biomechanical Phenomena; D016022:Case-Control Studies; D005260:Female; D005684:Gait / Q000502:physiology; D006801:Humans; D007593:Joint Instability / Q000503:physiopathology*; D008297:Male; D016059:Range of Motion, Articular; D012420:Running / Q000502:physiology*; D013647:Task Performance and Analysis; D055815:Young Adult