Acute and chronic lateral ankle instability are common in high-demand patient populations. If not managed appropriately, patients may experience recurrent instability, chronic pain, osteochondral lesions of the talus,...Acute and chronic lateral ankle instability are common in high-demand patient populations. If not managed appropriately, patients may experience recurrent instability, chronic pain, osteochondral lesions of the talus, premature osteoarthritis, and other significantlong-term disability. Certain populations, including young athletes, military personnel and those involved in frequent running, jumping, and cutting motions, are at increased risk. Proposed risk factors include prior ankle sprain, elevated body weight or body mass index, female gender, neuromuscular deficits, postural imbalance, foot/ankle malalignment, and exposure to at-risk athletic activity. Prompt, accurate diagnosis is crucial, and evidence-based, functional rehabilitation regimens have a proven track record in returning active patients to work and sport. When patients fail to improve with physical therapy and external bracing, multiple surgical techniques have been described with reliable results, including both anatomic and nonanatomic reconstructive methods. Anatomic repair of the lateral ligamentous complex remains the gold standard for recurrent ankle instability, and it effectively restores native ankle anatomy and joint kinematics while preserving physiologic ankle and subtalar motion. Further preventative measures may minimize the risk of ankle instability in athletic cohorts, including prophylactic bracing and combined neuromuscular and proprioceptive training programs. These interventions have demonstrated benefit in patients at heightened risk for lateral ankle sprain and allow active cohorts to return to full activity without adversely affecting athletic performance.展开更多
OBJECTIVE： Several studies have reported that acupuncture is effective for treatment of acute lumbar sprain, but they neglected to consider that acupuncture cannot remarkably improve lumbar activity. We performed a r...OBJECTIVE： Several studies have reported that acupuncture is effective for treatment of acute lumbar sprain, but they neglected to consider that acupuncture cannot remarkably improve lumbar activity. We performed a randomized controlled trial to evaluate the effect of acupuncture-movement therapy versus conventional acupuncture in the trea ment of acute lumbar sprain. METHODS： Sixty patients were randomized into four groups： the acupuncture-movement （AM） group, sham acupuncture-movement （SAM） group, conventional acupuncture （CA） group, and physical therapy （PT） group. Patients in the AM group were treated with acupuncture at Yintang （EX-HN 3） and exercise of the lumbar region during acupuncture. Patients in the SAM group were treated with sham acupuncture at Yintang （EX-HN 3） and exercise of the lumbar region during sham acupuncture. Con- ventional acupuncture was performed in the CA group, and physical therapy was applied in the PT group. Each treatment lasted for 20 min. Patients were assessed before and after treatment using a visual analogue scale （VAS） and the Roland Morris Questionnaire （RMQ）. RESULTS： The VAS and RMQ scores in the AM group were significantly lower after than before treatment （P 〈 0.01）. The AM group reported lower RMQ scores in after-treatment and 24 h after treatment and lower VAS score in 24 h after treatment in comparison with those of the CA, SAM, and PT groups （P 〈 0.05）. CONCULSlON： Acupuncture-movement therapy is effective for treating acute lumbar sprain with a persistent pain-relief and remarkable improvement of lumbar activity. Movement, that is, lumbar exercise during acupuncture, enhances the effect of acupuncture.展开更多
Acute ankle sprain is the most common lower limb injury in athletes and accounts for 16%-40%of all sports-related injuries.It is especially common in basketball,American football,and soccer.The majority of sprains aff...Acute ankle sprain is the most common lower limb injury in athletes and accounts for 16%-40%of all sports-related injuries.It is especially common in basketball,American football,and soccer.The majority of sprains affect the lateral ligaments,particularly the anterior talofibular ligament.Despite its high prevalence,a high proportion of patients experience persistent residual symptoms and injury recurrence.A detailed history and proper physical examination are diagnostic cornerstones.Imaging is not indicated for the majority of ankle sprain cases and should be requested according to the Ottawa ankle rules.Several interventions have been recommended in the management of acute ankle sprains including rest,ice,compression,and elevation,analgesic and anti-inflammatory medications,bracing and immobilization,early weight-bearing and walking aids,foot orthoses,manual therapy,exercise therapy,electrophysical modalities and surgery(only in selected refractory cases).Among these interventions,exercise and bracing have been recommended with a higher level of evidence and should be incorporated in the rehabilitation process.An exercise program should be comprehensive and progressive including the range of motion,stretching,strengthening,neuromuscular,proprioceptive,and sport-specific exercises.Decision-making regarding return to the sport in athletes may be challenging and a sports physician should determine this based on the self-reported variables,manual tests for stability,and functional performance testing.There are some common myths and mistakes in the management of ankle sprains,which all clinicians should be aware of and avoid.These include excessive imaging,unwarranted non-weightbearing,unjustified immobilization,delay in functional movements,and inadequate rehabilitation.The application of an evidence-based algorithmic approach considering the individual characteristics is helpful and should be recommended.展开更多
Background'. Up to 74% of people with a history of ankle sprain develop chronic ankle instability (CAI). One commonly reported residualimpairment is ankle pain;however, it has not been included in models or inclus...Background'. Up to 74% of people with a history of ankle sprain develop chronic ankle instability (CAI). One commonly reported residualimpairment is ankle pain;however, it has not been included in models or inclusion criteria for CAL We investigated the prevalence of pain inpeople with CAI and the association between presence of pain and other CAI characteristics.Methods'. Retrospective data from 1147 participants with CAI (age 26.6 ± 10.7 years, 59% female) were collated from previous studies that usedthe Cumberland Ankle Instability Tool as an assessment tool. Pain was assessed from Item 1 of the Cumberland Ankle Instability Tool, whichasks participants about ankle pain. Responses were divided into 3 categories: pain during daily activities, pain during moderate/vigorous physicalactivities, and no pain. The presence of pain was analyzed with descriptive statistics, the correlation between pain category and CAI characteris・tics was analyzed by /2 tests and factors associated with each pain category were analyzed by logistic regression.Results'. Among the participants, 60.1% (n = 689) reported ankle pain. Of all participants, 12.4% (n = 142) reported pain during daily activities,47.7% (n = 547) reported pain during moderate/vigorous physical activities, and 39.9% (n = 458) reported no pain. There was a strong associationbetween ankle instability and ankle pain (/2 = 122.2, p < 0.001, OR = 53& 95% confidence interval (CI): 3.84—7.53). Perceived ankle instability,age and unilateral ankle sprains were independently associated with pain (ankle instability: /2 = 43.29, p < 0.001;age: /2 = 30.37,p < 0.001;unilateral ankle sprains: /2 = 6.25, p < 0.05). There was no significant difference in the presence of pain between genders.Conclusion-. The prevalence of pain in people with CAI was high and was related to perceived ankle instability. Number of sprains, age, genderand unilateral or bilateral sprain did not modify this result except for the first pain category (pain during daily activities). There is large gap in展开更多
OBJECTIVE:To observe the effect of electroacupuncture(EA) on force-displacement value(FDV)of muscle state and the temperature index of infrared thermogram in patients with acute lumbar muscle sprain.METHODS:Patients w...OBJECTIVE:To observe the effect of electroacupuncture(EA) on force-displacement value(FDV)of muscle state and the temperature index of infrared thermogram in patients with acute lumbar muscle sprain.METHODS:Patients with acute lumbar muscle sprain were randomly divided into a medication group and an EA group.The medication group(n-60) were treated with diclofenac sodium dual release enteric-coated capsules,75 mg per day for 7days.The EA group(n = 60) received EA at bilateral Houxi(SI 3),Jiaji(EX-B2),and Ashi points,at 20-30 mm depth and 10-25 Hz frequency for 20 min daily for 7 days.Muscle states were determined by measuring FDVs of the bilateral lumbar muscle with a Myotonometer fast muscle state detector.The temperature index of the lumbar skin was measured before and after treatment with a Fluke Ti30 non-refrigerated focal plane infrared thermal imaging detector.RESULTS:There were no significant pre-treatment differences between the medication group and the EA group in mean FDV(P = 0.052) or temperature index of the lumbar skin(P = 0.25).The cure rate was 63.3%in the EA group and 53.3%in the medication group.The total efficacy in the EA group(93.3%) was not significantly different from that in the medication group(86.6%,P = 0.204).After treatment,the mean FDV of the lumbar muscle significantly increased in both groups(P < 0.05 for both groups);the FDV increase in the EA group was significantly higher than in the medication group(P = 0.015).The temperature index was also significantly increased in both groups(P < 0.05 for both groups);the infrared thermogram in the EA group indicated significantly greater recovery compared to the medication group(P = 0.026).CONCLUSION:Both EA and diclofenac sodium markedly improved acute lumbar sprain,but EA better improved the rehabilitation and regeneration of FDVs and temperature index of infrared thermogram of the muscle.展开更多
Purpose:The purpose of this study was to examine effects of a sport version of a semi-rigid ankle brace (ElementTM) and a soft ankle brace (ASO) on ankle biomechanics and ground reaction forces (GRFs) during a drop la...Purpose:The purpose of this study was to examine effects of a sport version of a semi-rigid ankle brace (ElementTM) and a soft ankle brace (ASO) on ankle biomechanics and ground reaction forces (GRFs) during a drop landing activity in subjects with chronic ankle instability (CAI)compared to healthy subjects with no history of CAI.Methods:Ten healthy subjects and 10 subjects who had multiple ankle sprains participated in the study as the control and unstable subjects,respectively.The CAI subjects were age,body mass index and gender matched with the control subjects.The arch index and ankle functions of the subjects were measured in a subject screening session.During the biomechanical test session,participants performed five trials of drop landing from 0.6 m,wearing no brace ( NB),ElementTM brace and ASO brace.Simultaneous recording of three-dimensional kinematic (240 Hz)and GRF (1200 Hz) data were performed.Results:The CAI subjects had lower ankle functional survey scores.The arch index and deformity results showed greater arch deformity of ElementTM against a static load than in NB and ASO due to greater initial arch position held by the brace.CAI participants had greater eversion velocity than healthy coutrols.The ASO brace reduced the first peak vertical GRF whereas ElementTM increased 2nd peak vertical GRF.ElementTM brace reduced eversion range of motion (ROM) and peak eversion velocity compared to NB and ASO.In addition,ElementTM reduced dorsiflexion ROM and increased peak plantarflexion moment compared to NB and ASO.Conclusion:Results of static arch measurements and dynamic ankle motion suggest that the restrictions offered by both braces are in part due to more dorsiflexed ankle positions at contact,and higher initial arch position and stiffer ankle for ElementTM.展开更多
Ankle fractures are accompanied by a syndesmotic injury in about 10% of operatively treated ankle fractures. Usually, the total rupture of the syndesmotic ligaments with an external rotation force is associated with a...Ankle fractures are accompanied by a syndesmotic injury in about 10% of operatively treated ankle fractures. Usually, the total rupture of the syndesmotic ligaments with an external rotation force is associated with a Weber type B or C fracture or a Maisonneuve fracture. The clinical assessment should consist of a comprehensive history including mechanism of injury followed by a specific physical examination. Radiographs, and if in doubt magnetic resonance imaging, are needed to ascertain the syndesmotic injury. In the case of operative treatment the method of fixation, the height and number of screws and the need for hardware removal are still under discussion. Furthermore, intraoperative assessment of the accuracy of reduction of the fibula in the incisura using fluoroscopy is difficult. A possible solution might be the assessment with intraoperative three-dimensional imaging. The aim of this article is to provide a current concepts review of the clinical presentation, diagnosis and treatment of syndesmotic injuries.展开更多
Background:Several case studies observed that the lateral ankle sprain resulted from a sudden increase in ankle inversion accompanied by internal rotation.However,without sufficient ankle kinetics and muscle activity ...Background:Several case studies observed that the lateral ankle sprain resulted from a sudden increase in ankle inversion accompanied by internal rotation.However,without sufficient ankle kinetics and muscle activity information in the literature,the detailed mechanism of ankle sprain is still unrevealed.The purpose of our case report is to present 2 accidental ankle giving way incidents for participants with chronic ankle instability(CAI)and compare to their normal trials with data of kinematics,kinetics,and electromyography(EMG).Case description:Two young female participants accidentally experienced the ankle giving way when landing on a 25°lateral-tilted force plate.3 D kinematics,kinetics,and muscle activity were recorded for the lower extremity.Qualitative comparisons were made between the giving way trials and normal trials for joint angles,angular velocities,moments,centers of pressure and EMG linear envelopes.Results:One participant’s giving way trial displayed increased ankle inversion and internal rotation angles in the pre-landing phase and at initial contact compared to her normal trials.Another participant’s giving way trial exhibited greater hip abduction angles and delayed activation of the peroneus longus muscle in the pre-landing phase versus her normal trials.Conclusion:A vulnerable ankle position(i.e.,more inverted and internally rotated),and a late activation of peroneus activity in the pre-landing phase could result in the ankle giving way or even sprains.A neutral ankle position and early activation of ankle evertors before landing may be helpful in preventing ankle sprains.展开更多
文摘Acute and chronic lateral ankle instability are common in high-demand patient populations. If not managed appropriately, patients may experience recurrent instability, chronic pain, osteochondral lesions of the talus, premature osteoarthritis, and other significantlong-term disability. Certain populations, including young athletes, military personnel and those involved in frequent running, jumping, and cutting motions, are at increased risk. Proposed risk factors include prior ankle sprain, elevated body weight or body mass index, female gender, neuromuscular deficits, postural imbalance, foot/ankle malalignment, and exposure to at-risk athletic activity. Prompt, accurate diagnosis is crucial, and evidence-based, functional rehabilitation regimens have a proven track record in returning active patients to work and sport. When patients fail to improve with physical therapy and external bracing, multiple surgical techniques have been described with reliable results, including both anatomic and nonanatomic reconstructive methods. Anatomic repair of the lateral ligamentous complex remains the gold standard for recurrent ankle instability, and it effectively restores native ankle anatomy and joint kinematics while preserving physiologic ankle and subtalar motion. Further preventative measures may minimize the risk of ankle instability in athletic cohorts, including prophylactic bracing and combined neuromuscular and proprioceptive training programs. These interventions have demonstrated benefit in patients at heightened risk for lateral ankle sprain and allow active cohorts to return to full activity without adversely affecting athletic performance.
基金Supported by Study the mechanism based on the p38MAPK signal pathway mediated by Cautery moxibustion therapy of Hui medicine treatment IDD(The National Natural Science Foundation of China,No.81360567)Evaluation of different moxibustion doses for low back pain:a randomized controlled clinical trial of moxibustion therapy on CV4(Ningxia Natural Science Foundation,No.NZ11208)
文摘OBJECTIVE： Several studies have reported that acupuncture is effective for treatment of acute lumbar sprain, but they neglected to consider that acupuncture cannot remarkably improve lumbar activity. We performed a randomized controlled trial to evaluate the effect of acupuncture-movement therapy versus conventional acupuncture in the trea ment of acute lumbar sprain. METHODS： Sixty patients were randomized into four groups： the acupuncture-movement （AM） group, sham acupuncture-movement （SAM） group, conventional acupuncture （CA） group, and physical therapy （PT） group. Patients in the AM group were treated with acupuncture at Yintang （EX-HN 3） and exercise of the lumbar region during acupuncture. Patients in the SAM group were treated with sham acupuncture at Yintang （EX-HN 3） and exercise of the lumbar region during sham acupuncture. Con- ventional acupuncture was performed in the CA group, and physical therapy was applied in the PT group. Each treatment lasted for 20 min. Patients were assessed before and after treatment using a visual analogue scale （VAS） and the Roland Morris Questionnaire （RMQ）. RESULTS： The VAS and RMQ scores in the AM group were significantly lower after than before treatment （P 〈 0.01）. The AM group reported lower RMQ scores in after-treatment and 24 h after treatment and lower VAS score in 24 h after treatment in comparison with those of the CA, SAM, and PT groups （P 〈 0.05）. CONCULSlON： Acupuncture-movement therapy is effective for treating acute lumbar sprain with a persistent pain-relief and remarkable improvement of lumbar activity. Movement, that is, lumbar exercise during acupuncture, enhances the effect of acupuncture.
文摘Acute ankle sprain is the most common lower limb injury in athletes and accounts for 16%-40%of all sports-related injuries.It is especially common in basketball,American football,and soccer.The majority of sprains affect the lateral ligaments,particularly the anterior talofibular ligament.Despite its high prevalence,a high proportion of patients experience persistent residual symptoms and injury recurrence.A detailed history and proper physical examination are diagnostic cornerstones.Imaging is not indicated for the majority of ankle sprain cases and should be requested according to the Ottawa ankle rules.Several interventions have been recommended in the management of acute ankle sprains including rest,ice,compression,and elevation,analgesic and anti-inflammatory medications,bracing and immobilization,early weight-bearing and walking aids,foot orthoses,manual therapy,exercise therapy,electrophysical modalities and surgery(only in selected refractory cases).Among these interventions,exercise and bracing have been recommended with a higher level of evidence and should be incorporated in the rehabilitation process.An exercise program should be comprehensive and progressive including the range of motion,stretching,strengthening,neuromuscular,proprioceptive,and sport-specific exercises.Decision-making regarding return to the sport in athletes may be challenging and a sports physician should determine this based on the self-reported variables,manual tests for stability,and functional performance testing.There are some common myths and mistakes in the management of ankle sprains,which all clinicians should be aware of and avoid.These include excessive imaging,unwarranted non-weightbearing,unjustified immobilization,delay in functional movements,and inadequate rehabilitation.The application of an evidence-based algorithmic approach considering the individual characteristics is helpful and should be recommended.
基金supported by a Ph.D.scholarship from Najran University in Najran,Saudi Arabia
文摘Background'. Up to 74% of people with a history of ankle sprain develop chronic ankle instability (CAI). One commonly reported residualimpairment is ankle pain;however, it has not been included in models or inclusion criteria for CAL We investigated the prevalence of pain inpeople with CAI and the association between presence of pain and other CAI characteristics.Methods'. Retrospective data from 1147 participants with CAI (age 26.6 ± 10.7 years, 59% female) were collated from previous studies that usedthe Cumberland Ankle Instability Tool as an assessment tool. Pain was assessed from Item 1 of the Cumberland Ankle Instability Tool, whichasks participants about ankle pain. Responses were divided into 3 categories: pain during daily activities, pain during moderate/vigorous physicalactivities, and no pain. The presence of pain was analyzed with descriptive statistics, the correlation between pain category and CAI characteris・tics was analyzed by /2 tests and factors associated with each pain category were analyzed by logistic regression.Results'. Among the participants, 60.1% (n = 689) reported ankle pain. Of all participants, 12.4% (n = 142) reported pain during daily activities,47.7% (n = 547) reported pain during moderate/vigorous physical activities, and 39.9% (n = 458) reported no pain. There was a strong associationbetween ankle instability and ankle pain (/2 = 122.2, p < 0.001, OR = 53& 95% confidence interval (CI): 3.84—7.53). Perceived ankle instability,age and unilateral ankle sprains were independently associated with pain (ankle instability: /2 = 43.29, p < 0.001;age: /2 = 30.37,p < 0.001;unilateral ankle sprains: /2 = 6.25, p < 0.05). There was no significant difference in the presence of pain between genders.Conclusion-. The prevalence of pain in people with CAI was high and was related to perceived ankle instability. Number of sprains, age, genderand unilateral or bilateral sprain did not modify this result except for the first pain category (pain during daily activities). There is large gap in
基金Supported by the Study on the Clinical Curative Effect and Standardization of Acupuncture and Tuina Treatment of Acute Lumbar Sprain from the Projects of Science and Technology Commission of Shanghai Municipality(No.10DZ1974700)the Clinical Research on Acupuncture and Tuina Treatment of Acute Lumbar Sprain Scheme Optimization and Rehabilitation Evaluation from Shanghai Municipal Health Bureau(No.2010QL035A)+2 种基金the Research on the Spreading Appropriate Technology of TCM in Shanghai(No.2010G007A)the Study on the Inheritance of Lushi Acupuncture about Shanghai Traditional Chinese Medicine Schools(No.ZYSNXD-CC-HPGC-JD-004)the Program of TCM Personnel Training in Shanghai(No.ZY3-RCPY-2-2034)
文摘OBJECTIVE:To observe the effect of electroacupuncture(EA) on force-displacement value(FDV)of muscle state and the temperature index of infrared thermogram in patients with acute lumbar muscle sprain.METHODS:Patients with acute lumbar muscle sprain were randomly divided into a medication group and an EA group.The medication group(n-60) were treated with diclofenac sodium dual release enteric-coated capsules,75 mg per day for 7days.The EA group(n = 60) received EA at bilateral Houxi(SI 3),Jiaji(EX-B2),and Ashi points,at 20-30 mm depth and 10-25 Hz frequency for 20 min daily for 7 days.Muscle states were determined by measuring FDVs of the bilateral lumbar muscle with a Myotonometer fast muscle state detector.The temperature index of the lumbar skin was measured before and after treatment with a Fluke Ti30 non-refrigerated focal plane infrared thermal imaging detector.RESULTS:There were no significant pre-treatment differences between the medication group and the EA group in mean FDV(P = 0.052) or temperature index of the lumbar skin(P = 0.25).The cure rate was 63.3%in the EA group and 53.3%in the medication group.The total efficacy in the EA group(93.3%) was not significantly different from that in the medication group(86.6%,P = 0.204).After treatment,the mean FDV of the lumbar muscle significantly increased in both groups(P < 0.05 for both groups);the FDV increase in the EA group was significantly higher than in the medication group(P = 0.015).The temperature index was also significantly increased in both groups(P < 0.05 for both groups);the infrared thermogram in the EA group indicated significantly greater recovery compared to the medication group(P = 0.026).CONCLUSION:Both EA and diclofenac sodium markedly improved acute lumbar sprain,but EA better improved the rehabilitation and regeneration of FDVs and temperature index of infrared thermogram of the muscle.
基金supported in part by DeRoyal Industries, Inc.,Powell,TN,USA
文摘Purpose:The purpose of this study was to examine effects of a sport version of a semi-rigid ankle brace (ElementTM) and a soft ankle brace (ASO) on ankle biomechanics and ground reaction forces (GRFs) during a drop landing activity in subjects with chronic ankle instability (CAI)compared to healthy subjects with no history of CAI.Methods:Ten healthy subjects and 10 subjects who had multiple ankle sprains participated in the study as the control and unstable subjects,respectively.The CAI subjects were age,body mass index and gender matched with the control subjects.The arch index and ankle functions of the subjects were measured in a subject screening session.During the biomechanical test session,participants performed five trials of drop landing from 0.6 m,wearing no brace ( NB),ElementTM brace and ASO brace.Simultaneous recording of three-dimensional kinematic (240 Hz)and GRF (1200 Hz) data were performed.Results:The CAI subjects had lower ankle functional survey scores.The arch index and deformity results showed greater arch deformity of ElementTM against a static load than in NB and ASO due to greater initial arch position held by the brace.CAI participants had greater eversion velocity than healthy coutrols.The ASO brace reduced the first peak vertical GRF whereas ElementTM increased 2nd peak vertical GRF.ElementTM brace reduced eversion range of motion (ROM) and peak eversion velocity compared to NB and ASO.In addition,ElementTM reduced dorsiflexion ROM and increased peak plantarflexion moment compared to NB and ASO.Conclusion:Results of static arch measurements and dynamic ankle motion suggest that the restrictions offered by both braces are in part due to more dorsiflexed ankle positions at contact,and higher initial arch position and stiffer ankle for ElementTM.
文摘Ankle fractures are accompanied by a syndesmotic injury in about 10% of operatively treated ankle fractures. Usually, the total rupture of the syndesmotic ligaments with an external rotation force is associated with a Weber type B or C fracture or a Maisonneuve fracture. The clinical assessment should consist of a comprehensive history including mechanism of injury followed by a specific physical examination. Radiographs, and if in doubt magnetic resonance imaging, are needed to ascertain the syndesmotic injury. In the case of operative treatment the method of fixation, the height and number of screws and the need for hardware removal are still under discussion. Furthermore, intraoperative assessment of the accuracy of reduction of the fibula in the incisura using fluoroscopy is difficult. A possible solution might be the assessment with intraoperative three-dimensional imaging. The aim of this article is to provide a current concepts review of the clinical presentation, diagnosis and treatment of syndesmotic injuries.
文摘Background:Several case studies observed that the lateral ankle sprain resulted from a sudden increase in ankle inversion accompanied by internal rotation.However,without sufficient ankle kinetics and muscle activity information in the literature,the detailed mechanism of ankle sprain is still unrevealed.The purpose of our case report is to present 2 accidental ankle giving way incidents for participants with chronic ankle instability(CAI)and compare to their normal trials with data of kinematics,kinetics,and electromyography(EMG).Case description:Two young female participants accidentally experienced the ankle giving way when landing on a 25°lateral-tilted force plate.3 D kinematics,kinetics,and muscle activity were recorded for the lower extremity.Qualitative comparisons were made between the giving way trials and normal trials for joint angles,angular velocities,moments,centers of pressure and EMG linear envelopes.Results:One participant’s giving way trial displayed increased ankle inversion and internal rotation angles in the pre-landing phase and at initial contact compared to her normal trials.Another participant’s giving way trial exhibited greater hip abduction angles and delayed activation of the peroneus longus muscle in the pre-landing phase versus her normal trials.Conclusion:A vulnerable ankle position(i.e.,more inverted and internally rotated),and a late activation of peroneus activity in the pre-landing phase could result in the ankle giving way or even sprains.A neutral ankle position and early activation of ankle evertors before landing may be helpful in preventing ankle sprains.
