Six Weeks of Strength and Proprioception Training Does Not Affect Muscle Fatigue and Static Balance in Functional Ankle Instability

2004 ◽  
Vol 13 (3) ◽  
pp. 201-227 ◽  
Author(s):  
Michael E. Powers ◽  
Bernadette D. Buckley ◽  
Thomas W. Kaminski ◽  
Tricia J. Hubbard ◽  
Cindy Ortiz
Keyword(s):  
Muscle Fatigue ◽  
Sports Medicine ◽  
Center Of Pressure ◽  
Ankle Instability ◽  
Force Plate ◽  
Static Balance ◽  
Functional Ankle Instability ◽  
Medicine Research ◽  
Power Frequency ◽  
Electromyographic Signal

Context:The combined effects of strength and proprioception training, especially in individuals with ankle instability, have not been studied extensively.Objective:To examine the influence of 6 weeks of strength and proprioception training on measures of muscle fatigue and static balance in those with unilateral functional ankle instability (FAI).Design:Pretest–posttest, randomized groups.Setting:A climate-controlled sports-medicine research laboratory.Subjects:38 subjects with self-reported unilateral FAI.Measurements:Muscle fatigue was determined using the median power frequency (fmed) from an electromyographic signal, and static balance was assessed using center-of-pressure values obtained from a triaxial force plate.Results:There were no significant effects of the strength or proprioception training on our measures of muscle fatigue and static balance.Conclusions:Strength training, proprioception training, and the combination of the 2 failed to improve postural-stability characteristics in a group of subjects with FAI.

Fatigue’s Effect on Eversion Force Sense in Individuals With and Without Functional Ankle Instability

2012 ◽  
Vol 21 (2) ◽  
pp. 127-136 ◽  
Author(s):  
Cynthia J. Wright ◽  
Brent L. Arnold
Keyword(s):  
Outcome Measures ◽  
Repeated Measures ◽  
Sports Medicine ◽  
Ankle Instability ◽  
Absolute Error ◽  
Ankle Sprains ◽  
Functional Ankle Instability ◽  
Maximal Voluntary Isometric Contraction ◽  
Medicine Research ◽  
Force Sense

Context:Force sense (FS), the proprioceptive ability to detect muscle-force generation, has been shown to be impaired in individuals with functional ankle instability (FAI). Fatigue can also impair FS in healthy individuals, but it is unknown how fatigue affects FS in individuals with FAI.Objective:To assess the effect of fatigue on ankle-eversion force-sense error in individuals with and without FAI. Design: Case control with repeated measures.Setting:Sports medicine research laboratory.Participants:32 individuals with FAI and 32 individuals with no ankle sprains or instability in their lifetime. FAI subjects had a history of ≥1 lateral ankle sprain and giving-way ≥1 episode per month.Interventions:Three eversion FS trials were captured per load (10% and 30% of maximal voluntary isometric contraction) using a load cell before and after a concentric eversion fatigue protocol.Main Outcome Measures:Trial error was the difference between the target and reproduction forces. Constant error (CE), absolute error (AE), and variable error (VE) were calculated from 3 trial errors. A Group × Fatigue × Load repeated-measures ANOVA was performed for each error.Results:There were no significant 3-way interactions or 2-way interactions involving group (all P > .05). CE and AE had a significant 2-way interaction between load and fatigue (CE: F1,62 = 8.704, P = .004; AE: F1,62 = 4.024, P = .049), and VE had a significant main effect for fatigue (F1,62 = 5.130, P = .027), all of which indicated increased FS error with fatigue at 10% load. However, at 30% load only VE increased with fatigue. The FAI group had greater error as measured by AE (F1,62 = 4.571, P = .036) but not CE or VE (P > .05).Conclusions:Greater AE indicates that FAI individuals are less accurate in their force production. Fatigue impaired force sense in all subjects equally. These deficits provide evidence of impaired proprioception with fatigue and in individuals with FAI.

scholarly journals Orthotic Intervention and Postural Stability in Participants With Functional Ankle Instability After an Accommodation Period

2012 ◽  
Vol 47 (2) ◽  
pp. 130-135 ◽  
Author(s):  
Chris Hamlyn ◽  
Carrie L. Docherty ◽  
Joanne Klossner
Keyword(s):  
Postural Stability ◽  
Center Of Pressure ◽  
Ankle Instability ◽  
Force Plate ◽  
Treatment Protocol ◽  
Control Group ◽  
Controlled Clinical Trial ◽  
Functional Ankle Instability ◽  
Eyes Closed ◽  
Athletic Shoes

Context: Most protocols established to treat patients with functional ankle instability (FAI) have focused on taping the ankle. Orthotic intervention is a different treatment protocol that may have a positive effect on these patients, especially after an accommodation period. Objective: To determine whether the use of a prefabricated orthotic affects postural stability in patients with FAI and a control group. Design: Randomized controlled clinical trial. Setting: Research laboratory. Patients or Other Participants: Forty patients with unilateral FAI. Intervention(s): Postural stability was measured on both limbs using a force plate on 3 occasions. Participants were instructed to balance on 1 limb with their eyes closed for 20 seconds. In session 1, postural stability was measured with the patient wearing his or her own athletic shoes. The control group repeated this procedure in sessions 2 and 3. When those in the orthotic group returned for session 2, they received prefabricated, full-length Quick Comfort Insoles for both feet, immediately placed the orthotics in their shoes, and were tested for postural stability. Patients in the orthotic group were instructed to wear the inserts daily and return 2 weeks later for session 3 and repeat postural stability testing. Main Outcome Measure(s): Center of pressure. Results: In the orthotic group, postural stability improved between sessions 1 and 2 and sessions 1 and 3. In session 3, postural stability was different for the orthotic and control groups. We also identified a difference between the limbs such that the FAI ankle displayed worse postural stability than did the healthy ankle. Conclusions: Prefabricated orthotics improved postural stability in participants with FAI. Similar to the findings of previous researchers, we found that postural stability was worse in FAI ankles than in healthy ankles.

Assessing Functional Ankle Instability with Joint Position Sense, Time to Stabilization, and Electromyography

2004 ◽  
Vol 13 (2) ◽  
pp. 122-134 ◽  
Author(s):  
Cathleen Brown ◽  
Scott Ross ◽  
Rick Mynark ◽  
Kevin Guskiewicz
Keyword(s):  
Outcome Measures ◽  
Sports Medicine ◽  
Ankle Instability ◽  
Position Sense ◽  
Joint Position Sense ◽  
Joint Position ◽  
Functional Ankle Instability ◽  
Medicine Research ◽  
Recreational Athletes ◽  
Time To Stabilization

Context:Functional ankle instability (FAI) is difficult to identify and quantify.Objective:To compare joint position sense (JPS), time to stabilization (TTS), and electromy-ography (EMG) of ankle musculature in recreational athletes with and without FAI.Design:Case-control compared withttests and ANOVAs.Setting:Sports medicine research laboratory.Participants:20 recreational athletes.Main Outcome Measures:Passive angle reproduction, TTS, and mean EMG amplitude of the tibialis anterior, peroneals, lateral gastrocnemius, and soleus muscles during single-leg-jump landing.Results:No differences in JPS or medial-lateral TTS measures between groups. Significantly longer anterior-posterior TTS (P< .05) in the unstable ankle group. The stable ankle group had significantly higher mean EMG soleus amplitude after landing (P< .05). No other significant differences were found for mean EMG amplitudes before or after landing.Conclusions:Subjects with FAI demonstrated deficits in landing stability and soleus muscle activity during landing that may represent chronic adaptive changes following injury.

scholarly journals Validity and Reliability of Nintendo Wii Fit Balance Scores

2012 ◽  
Vol 47 (3) ◽  
pp. 306-313 ◽  
Author(s):  
Erik A. Wikstrom
Keyword(s):  
Sports Medicine ◽  
Concurrent Validity ◽  
Center Of Pressure ◽  
Intraclass Correlation ◽  
Lower Extremity Injury ◽  
Validity And Reliability ◽  
Nintendo Wii ◽  
Balance Test ◽  
Medicine Research ◽  
Wii Fit

Context:Interactive gaming systems have the potential to help rehabilitate patients with musculoskeletal conditions. The Nintendo Wii Balance Board, which is part of the Wii Fit game, could be an effective tool to monitor progress during rehabilitation because the board and game can provide objective measures of balance. However, the validity and reliability of Wii Fit balance scores remain unknown.Objective:To determine the concurrent validity of balance scores produced by the Wii Fit game and the intrasession and intersession reliability of Wii Fit balance scores.Design:Descriptive laboratory study.Setting:Sports medicine research laboratory.Patients or Other Participants:Forty-five recreationally active participants (age  =  27.0 ± 9.8 years, height  =  170.9 ± 9.2 cm, mass  =  72.4 ± 11.8 kg) with a heterogeneous history of lower extremity injury.Intervention(s):Participants completed a single-limb–stance task on a force plate and the Star Excursion Balance Test (SEBT) during the first test session. Twelve Wii Fit balance activities were completed during 2 test sessions separated by 1 week.Main Outcome Measure(s):Postural sway in the anteroposterior (AP) and mediolateral (ML) directions and the AP, ML, and resultant center-of-pressure (COP) excursions were calculated from the single-limb stance. The normalized reach distance was recorded for the anterior, posteromedial, and posterolateral directions of the SEBT. Wii Fit balance scores that the game software generated also were recorded.Results:All 96 of the calculated correlation coefficients among Wii Fit activity outcomes and established balance outcomes were interpreted as poor (r &lt; 0.50). Intrasession reliability for Wii Fit balance activity scores ranged from good (intraclass correlation coefficient [ICC]  =  0.80) to poor (ICC  =  0.39), with 8 activities having poor intrasession reliability. Similarly, 11 of the 12 Wii Fit balance activity scores demonstrated poor intersession reliability, with scores ranging from fair (ICC  =  0.74) to poor (ICC  =  0.29).Conclusions:Wii Fit balance activity scores had poor concurrent validity relative to COP outcomes and SEBT reach distances. In addition, the included Wii Fit balance activity scores generally had poor intrasession and intersession reliability.

scholarly journals Static Balance in Patients with Vestibular Impairments: A Preliminary Study

Scientifica ◽  
2016 ◽  
Vol 2016 ◽  
pp. 1-4 ◽  
Author(s):  
Hossein Talebi ◽  
Mohammad Taghi Karimi ◽  
Seyed Hamid Reza Abtahi ◽  
Niloofar Fereshtenejad
Keyword(s):  
Path Length ◽  
Center Of Pressure ◽  
Balance Control ◽  
Force Plate ◽  
Static Balance ◽  
Eyes Closed ◽  
Significant Difference ◽  
Eyes Open ◽  
Age Limits ◽  
The Difference

Aims. Vestibular system is indicated as one of the most important sensors responsible for static and dynamic postural control. In this study, we evaluated static balance in patients with unilateral vestibular impairments.Materials and Methods. We compared static balance control using Kistler force plate platform between 10 patients with unilateral vestibular impairments and 20 normal counterparts in the same sex ratio and age limits (50±7). We evaluated excursion and velocity of center of pressure (COP) and path length in anteroposterior (AP) and mediolateral (ML) planes with eyes open and with eyes closed.Results. There was no significant difference between COP excursions in ML and AP planes between both groups with eyes open and eyes closed (pvalue > 0.05). In contrast, the difference between velocity and path length of COP in the mentioned planes was significant between both groups with eyes open and eyes closed (pvalue < 0.05).Conclusions. The present study showed the static instability and balance of patients with vestibular impairments indicated by the abnormal characteristics of body balance.

Alterations in evertor/invertor muscle activation and center of pressure trajectory in participants with functional ankle instability

2012 ◽  
Vol 22 (2) ◽  
pp. 280-285 ◽  
Author(s):  
J. Ty Hopkins ◽  
Mark Coglianese ◽  
Philip Glasgow ◽  
Shane Reese ◽  
Matthew K. Seeley
Keyword(s):  
Muscle Activation ◽  
Center Of Pressure ◽  
Ankle Instability ◽  
Functional Ankle Instability

scholarly journals Effect of ultrasound-guided percutaneous neuromodulation in ankle instability: a case study

2019 ◽  
Vol 02 (02) ◽  
pp. 100-101
Author(s):  
Rodríguez Rosal M. ◽  
Sánchez Sixto A. ◽  
Álvarez Barbosa F. ◽  
Yáñez Álvarez A.
Keyword(s):  
Effect Size ◽  
Center Of Pressure ◽  
Tibial Nerve ◽  
Ankle Instability ◽  
Center Of Mass ◽  
Force Plate ◽  
Chronic Ankle Instability ◽  
Balance Test ◽  
Eyes Closed ◽  
Eyes Open

Abstract Background and Aims Ankle proprioception can be tested in many ways. Some studies have found improvements in individuals with chronic ankle instability after receiving treatment and training proprioceptive acuity and speed. Currently, there is a scarcity of evidence concerning percutaneous neuromodulation. The first findings were reported in the post-surgical stage after total knee arthroplasty and in neural improvements and symptoms in patients with hyperactive bladder. Aim To evaluate the effectiveness of percutaneous neuromodulation on the tibial nerve for the improvement of various proprioception parameters in patients with chronic ankle instability. Material and Methods Five men (age: 24.8 ± 4.9 years; height: 1.78 ± 0.08 m; weight: 86 ± 9.8 kg) with chronic ankle instability, who regularly practiced sports activities participated in the present study. People who had undergone an injury in the previous three months were excluded from the speed. Currently, there is a scarcity of evidence concerning test before and immediately after percutaneous neuromodulation. A single leg balance test was performed with eyes open and closed, maintaining the single-legged position on a force plate during 30 seconds (Accupower; AMTI, Watertown, MA) registering 1000 Hz. The displacement of the center of pressure (DOT) was determined based on the distances of its antero-posterior axes (DOT_AP) and medio-lateral (DOT_ML). Furthermore, the amplitudes of anteroposterior and mediolateral displacement were evaluated (ACPap and ACPml). The posterior tibial nerve was stimulated under ultrasound guidance using a 100 Vpp current, with a pulse width of 250 μs and a repetition frequency of 2 to 10 Hz. The process was performed on three occasions during 30 seconds, with an intensity that was acknowledged by the patient but which did not go beyond a score of 3 in the visual analog scale (VAS). The means and standard deviations were calculated for all variables. The effect size was calculated establishing the confidence interval at 90% and the probability of the change being significant was qualitatively calculated. Results A decrease was found in the ACPap (Pre-test eyes open: 5.42 ± 0.62 and eyes closed: 15.99 ± 0.60; Post-test eyes open 4.05 ± 0.36 and eyes closed 10.33 ± 0.49) after the neuromodulation intervention on the tibial nerve. This was a significant change and a “possible” effect size was found in the closed eyes condition (-0.54; ± 0.72), according to Hopkins. For the remaining variables, no significant differences were observed. Conclusions A decreased displacement of the center of mass was found in the antero-posterior axis after performing the neuromodulation technique on the tibial nerve in patients with chronic ankle instability.

scholarly journals COMPARISON OF VARIOUS FORCE PLATE MEASURES FOR THE ASSESSMENT OF FUNCTIONAL ANKLE INSTABILITY

2003 ◽  
Vol 35 (Supplement 1) ◽  
pp. S357
Author(s):  
S E. ROSS ◽  
K M. GUSKIEWICZ ◽  
W E GARRETT
Keyword(s):  
Ankle Instability ◽  
Force Plate ◽  
Functional Ankle Instability

Performance in Static, Dynamic, and Clinical Tests of Postural Control in Individuals with Recurrent Ankle Sprains

2004 ◽  
Vol 13 (3) ◽  
pp. 255-268 ◽  
Author(s):  
Lyn Nakagawa ◽  
Mark Hoffman
Keyword(s):  
Postural Control ◽  
Outcome Measures ◽  
Sports Medicine ◽  
Center Of Pressure ◽  
Dynamic Balance ◽  
Ankle Sprains ◽  
Clinical Tests ◽  
Balance Test ◽  
Medicine Research ◽  
Balance Tests

Objective:To evaluate postural control in individuals with recurrent ankle sprains with static, dynamic, and clinical balance tests and to examine the relationships between performances in each of these tests.Design:Postural control was evaluated with 3 different balance tests in individuals with and without recurrent ankle sprains.Participants:19 volunteers with recurrent ankle sprains and 19 uninjured control subjects.Interventions:None.Setting:University sports-medicine research laboratory.Main Outcome Measures:Total excursion of the center of pressure (COP) was calculated for the static and dynamic balance tests. Total reach distance was measured for the Star Excursion Balance Test.Results:Subjects with recurrent ankle sprains demonstrated significantly greater excursion of the COP in both the static and dynamic balance tests. Correlations between performances in all tests were very low.Conclusions:Recurrent ankle sprains might be associated with reduced postural control as demonstrated by decreased performance in static and dynamic balance tests.

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