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1.

Objective

To determine the amplitude of the electromyographic activity of trunk muscles during Pilates exercises in women with and without chronic low back pain (LBP).

Design

Case-control study.

Setting

University physical therapy clinic.

Participants

Women (N=60) divided into an LBP group and a control group.

Interventions

Not applicable.

Main Outcome Measures

Amplitude of the electromyographic activity (root mean square values) of the gluteus maximus and external oblique muscles collected during 3 Pilates exercises: Shoulder Bridge performed on the mat, and Hip Roll and Breathing performed in equipment. Pain intensity was assessed in the LBP group.

Results

The amplitude of the electromyographic activity was similar between groups (P≥.05). For both groups, the amplitude of the gluteus maximus was higher in the Shoulder Bridge exercise compared with the Hip Roll with 2 springs (control group: mean difference [MD]=.18; 95% confidence interval [CI], .05–.41; LBP group: MD=.29; 95% CI, .16–.31) and the Breathing exercise (control group: MD=?.40; 95% CI, ?.55 to ?.26; LBP group: MD=?.36; 95% CI, ?.52 to ?.20). The amplitude of the external oblique muscle was higher in the Shoulder Bridge compared with the Hip Roll with 2 springs (control group: MD=.13; 95% CI, .05–.21; LBP group: MD=.18; 95% CI, .03–.33). Pain intensity increased after exercises, but this increase was lower for the mat exercises.

Conclusions

Similar muscle activation between groups was found. The findings suggest that mat exercises caused less pain and a greater difference in the amplitude of muscle activation compared with the equipment-based exercises.  相似文献   

2.

Objective

To examine if a comorbid diagnosis of knee or hip osteoarthritis (OA) in older adults with new back pain visits is associated with long-term patient-reported outcomes and back-related health care use.

Design

Prospective cohort study.

Setting

Three integrated health systems forming the Back pain Outcomes using Longitudinal Data cohort.

Participants

Participants (N=5155) were older adults (≥65y) with a new visit for back pain and a complete electronic health record data.

Interventions

Not applicable; we obtained OA diagnoses using diagnostic codes in the electronic health record 12 months prior to the new back pain visit.

Main Outcome Measures

The Roland-Morris Disability Questionnaire (RDQ) and the EuroQol-5D (EQ-5D) were key patient-reported outcomes. Health care use, measured by relative-value units (RVUs), was summed for the 12 months after the initial visit. We used linear mixed-effects models to model patient-reported outcomes. We also used generalized linear models to test the association between comorbid knee or hip OA and total back-related RVUs.

Results

Of the 5155 participants, 368 (7.1%) had a comorbid knee OA diagnosis, and 94 (1.8%) had a hip OA diagnosis. Of the participants, 4711 (91.4%) had neither knee nor hip OA. In adjusted models, the 12-month RDQ score was 1.23 points higher (95% confidence interval [CI], 0.72–1.74) for patients with knee OA and 1.26 points higher (95% CI, 0.24–2.27) for those with hip OA than those without knee or hip OA, respectively. A lower EQ-5D score was found among participants with knee OA (.02 lower; 95% CI, ?.04 to ?.01) and hip OA diagnoses (.03 lower; 95% CI, ?.05 to ?.01) compared with those without knee or hip OA, respectively. Comorbid knee or hip OA was not significantly associated with total 12-month back-related resource use.

Conclusions

Comorbid knee or hip OA in older adults with a new back pain visit was associated with modestly worse long-term disability and health-related quality of life.  相似文献   

3.

Objectives

To provide reference data for the Cumberland Ankle Instability Tool (CAIT) and to investigate the prevalence and correlates of perceived ankle instability in a large healthy population.

Design

Cross-sectional observational study.

Setting

University laboratory.

Participants

Self-reported healthy individuals (N=900; age range, 8–101y, stratified by age and sex) from the 1000 Norms Project.

Interventions

Not applicable.

Main Outcome Measures

Participants completed the CAIT (age range, 18–101y) or CAIT-Youth (age range, 8–17y). Sociodemographic factors, anthropometric measures, hypermobility, foot alignment, toes strength, lower limb alignment, and ankle strength and range of motion were analyzed.

Results

Of the 900 individuals aged 8 to 101 years, 203 (23%) had bilateral and 73 (8%) had unilateral perceived ankle instability. The odds of bilateral ankle instability were 2.6 (95% confidence interval [CI], 1.7–3.8; P<.001) times higher for female individuals, decreased by 2% (95% CI, 1%–3%; P=.001) for each year of increasing age, increased by 3% (95% CI, 0%–6%; P=.041) for each degree of ankle dorsiflexion tightness, and increased by 4% (95% CI, 2%–6%, P<.001) for each centimeter of increased waist circumference.

Conclusions

Perceived ankle instability was common, with almost a quarter of the sample reporting bilateral instability. Female sex, younger age, increased abdominal adiposity, and decreased ankle dorsiflexion range of motion were independently associated with perceived ankle instability.  相似文献   

4.

Background

Ideally, high-stakes examinations assess 1 dimension of medical knowledge to produce precise estimates of a candidate’s performance. It has not been reported whether the American Board of Physical Medicine and Rehabilitation Part 1 Certification Examination (ABPMR-CE-1) is unidimensional or not.

Objective

To examine the ABPMR-CE-1 to measure how many dimensions it assesses.

Design

Retrospective observational study.

Setting

We assessed examination results from the 2015 ABPMR-CE-1.

Participants

A total of 489 deidentified candidates taking the 2015 ABPMR-CE-1.

Methods

A 1-parameter Item Response Theory (IRT) measurement model was utilized. A Principal Components Analysis (PCA) of standardized residual correlations was used to detect multidimensionality.

Main Outcome Measure

Number of primary dimensions reflected in the 325 test questions.

Results

The results of the dimensionality analysis indicated that the ABPMR-CE-1 examination is highly unidimensional from a psychometric perspective. Expert content review of the substantive content of small contrasting clusters of questions provided additional assurance of the unidimensional nature of the examination.

Conclusions

The ABPMR-CE-1 appears indeed to measure a single construct, which suggests a sound structure of the examination. It closely approximates the assumption of statistical unidimensionality.

Level of Evidence

Not applicable.  相似文献   

5.

Objectives

To assess the association of physical activity measures, derived with an accelerometer and a self-reported questionnaire, with fear of movement in patients with chronic nonspecific low back pain (LBP) and to investigate the association between disability and fear of movement in this population.

Design

Cross-sectional study.

Setting

Outpatient physical therapy university clinics.

Participants

Patients (N=119) presenting with nonspecific LBP of >3 months' duration.

Interventions

Not applicable.

Main Outcome Measures

Physical activity levels measured objectively with an accelerometer (ie, counts per minute, time spent in moderate-to-vigorous and light physical activity per day, number of steps per day, and number of 10-minute bouts of moderate-to-vigorous physical activity per day) and subjectively with a self-reported questionnaire (Baecke Physical Activity Questionnaire); fear of movement (Tampa Scale of Kinesiophobia); pain (11-point numerical rating scale); disability (Roland Morris Disability Questionnaire); and depression (Beck Depression Inventory). The associations were examined with correlational, univariate, and multivariable linear regression analyses.

Results

None of the objective physical activity measures were associated with fear of movement. The apparent association of self-reported physical activity levels with fear of movement (correlational analyses: r=?.18; P<.05; univariate regression analyses: β=?.04; 95% confidence interval [CI], ?.07 to ?.01; P=.04) was not confirmed in multivariable analyses. Fear of movement was consistently associated with disability in both correlational (r=.42; P<.01) and multivariable (β=.21; 95% CI, .11–.31; P<.001) analyses.

Conclusions

Our data support one aspect of the fear-avoidance model—that higher fear of movement is associated with more disability—but not the aspect of the model linking fear of movement with inactivity.  相似文献   

6.

Objective

To examine how patient satisfaction with care coordination and quality and access to medical care influence functional improvement or deterioration (activity limitation stage transitions), institutionalization, or death among older adults.

Design

National representative sample with 2-year follow-up.

Setting

Medicare Current Beneficiary Survey from calendar years 2001 to 2008.

Participants

Community-dwelling adults (N=23,470) aged ≥65 years followed for 2 years.

Interventions

Not applicable.

Main Outcome Measures

A multinomial logistic regression model taking into account the complex survey design was used to examine the association between patient satisfaction with care coordination and quality and patient satisfaction with access to medical care and activities of daily living (ADL) stage transitions, institutionalization, or death after 2 years, adjusting for baseline socioeconomics and health-related characteristics.

Results

Out of 23,470 Medicare beneficiaries, 14,979 (63.8% weighted) remained stable in ADL stage, 2508 (10.7% weighted) improved, 3210 (13.3% weighted) deteriorated, 582 (2.5% weighted) were institutionalized, and 2281 (9.7% weighted) died. Beneficiaries who were in the top quartile of satisfaction with care coordination and quality were less likely to be institutionalized (adjusted relative risk ratio [RRR], .68; 95% confidence interval [CI], .54–.86). Beneficiaries who were in the top quartile of satisfaction with access to medical care were less likely to functionally deteriorate (adjusted RRR, .87; 95% CI, .79–.97), be institutionalized (adjusted RRR, .72; 95% CI, .56–.92), or die (adjusted RRR, .86; 95% CI, .75–.98).

Conclusions

Knowledge of patient satisfaction with medical care and risk of functional deterioration may be helpful for monitoring and addressing disability-related health care disparities and the effect of ongoing policy changes among Medicare beneficiaries.  相似文献   

7.
8.
9.

Objective

To explore the feasibility of a newly developed smartphone-based exercise program with an embedded self-classification algorithm for office workers with neck pain, by examining its effect on the pain intensity, functional disability, quality of life, fear avoidance, and cervical range of motion (ROM).

Design

Single-group, repeated-measures design.

Setting

The laboratory and participants' home and work environments.

Participants

Offices workers with neck pain (N=23; mean age ± SD, 28.13±2.97y; 13 men).

Intervention

Participants were classified as having 1 of 4 types of neck pain through a self-classification algorithm implemented as a smartphone application, and conducted corresponding exercise programs for 10 to 12min/d, 3d/wk, for 8 weeks.

Main Outcome Measures

The visual analog scale (VAS), Neck Disability Index (NDI), Medical Outcomes Study 36-Item Short-Form Health Survey (SF-36), Fear-Avoidance Beliefs Questionnaire (FABQ), and cervical ROM were measured at baseline and postintervention.

Results

The VAS (P<.001) and NDI score (P<.001) indicated significant improvements in pain intensity and functional disability. Quality of life showed significant improvements in the physical functioning (P=.007), bodily pain (P=.018), general health (P=.022), vitality (P=.046), and physical component scores (P=.002) of the SF-36. The FABQ, cervical ROM, and mental component score of the SF-36 showed no significant improvements.

Conclusions

The smartphone-based exercise program with an embedded self-classification algorithm improves the pain intensity and perceived physical health of office workers with neck pain, although not enough to affect their mental and emotional states.  相似文献   

10.

Background

Stroke is a primary cause of death and disability in upper-middle–income countries such as Colombia. Given the lack of comprehensive rehabilitation for stroke patients in Colombia, there is a need to assess longitudinal mental health problems poststroke in this region.

Objective

To compare the course of mental health in stroke patients to healthy controls over the first year poststroke in Ibague, Colombia.

Design

Cross-sectional study.

Setting

The Psychological Attention Center of Antonio Nariño University in Ibague, Colombia.

Participants

Stroke patients (n = 50) and age- and gender-matched healthy controls (n = 50).

Methods

Patients and controls completed self-report Spanish versions of demographic information, injury-related characteristics, and mental health questionnaires

Main Outcome Measurements

Outcomes assessed included mental health (depression, anxiety, and stress) at 3, 6, and 12 months poststroke.

Results

Hierarchical linear models suggested that stroke patients had worse depression and anxiety over time than controls (P < .001). Among patients, depression and anxiety decreased over time (P < .001), whereas stress increased over time (P < .01). The findings suggest that although anxiety and depression improved over time in stroke patients, their mental health remained significantly lower than that of controls.

Conclusions

This is the first study to examine the course of mental health over the first year poststroke in Latin America, specifically in Ibague, Colombia. Despite the improvements in anxiety and depression over the first year poststroke, patient anxiety and depression were still worse in comparison to those in healthy controls. The current findings indicate a need for rehabilitation services in Colombia, especially targeting mental health issues.

Level of Evidence

I  相似文献   

11.

Background

A significant proportion of burn injury patients are admitted to inpatient rehabilitation facilities (IRFs). There is increasing interest in the use of functional variables, such as cognition, in predicting IRF outcomes. Cognitive impairment is an important cause of disability in the burn injury population, yet its relationship to IRF outcomes has not been studied.

Objective

To assess how cognitive function affects rehabilitation outcomes in the burn injury population.

Design

Retrospective study.

Setting

Inpatient rehabilitation facilities in the United States.

Participants

A total of 5347 adults admitted to an IRF with burn injury between 2002 and 2011.

Methods or Interventions

Multivariable regression was used to model rehabilitation outcome measures, using the cognitive domain of the Functional Independence Measure (FIM) instrument as the independent variable and controlling for demographic, medical, and facility covariates.

Main Outcome Measurements

FIM total gain, readmission to an acute care setting at any time during inpatient rehabilitation, readmission to an acute care setting in the first 3 days of IRF admission, rate of discharge to the community setting, and length of stay efficiency.

Results

Cognitive FIM total at admission was a significant predictor of FIM total gain, length of stay efficiency, and acute readmission at 3 days (P < .05). Cognitive FIM total scores did not have an impact on acute care readmission rate or discharge to the community setting.

Conclusions

Cognitive status may be an important predictor of rehabilitation outcomes in the burn injury population. Future work is needed to further examine the impact of specific cognitive interventions on rehabilitation outcomes in this population.

Level of Evidence

II  相似文献   

12.

Background

There is a growing interest in the use of biologic agents such as platelet-rich plasma and mesenchymal stem/stromal cells to treat musculoskeletal injuries, including meniscal tears. Although previous research has documented the role of diagnostic ultrasound to evaluate meniscal tears, sonographically guided (SG) techniques to specifically deliver therapeutic agents into the meniscus have not been described.

Objective

To describe and validate SG injection techniques for the body and posterior horn of the medial and lateral meniscus.

Design

Prospective, cadaveric laboratory investigation.

Setting

Academic institution procedural skills laboratory.

Subjects

Five unenbalmed cadaveric knee-ankle-foot specimens from 5 donors (3 female and 2 male) ages 33-92 years (mean age 74 years) with body mass indices of 21.1-32.4 kg/m2 (mean 24.1 kg/m2).

Methods

A single, experienced operator completed SG injections into the bodies and posterior horns of the medial and lateral menisci of 5 unenbalmed cadaveric knees using colored latex and a 22-gauge, 38-mm needle. After injection, coinvestigators dissected each specimen to assess latex distribution within the menisci and identify injury to intra-articular and periarticular structures.

Main Outcome Measures

Latex location within the target region of meniscus (accurate/inaccurate), and iatrogenic injury to “at risk” intra- and periarticular structures (present/absent).

Results

Seventeen of 20 injections were accurate. Two of 3 inaccurate injections infiltrated the posterior horn of the medial meniscus instead of the targeted meniscal body. One inaccurate lateral meniscus injection did not contain latex despite sonographically accurate needle placement. No specimen exhibited injury to regional neurovascular structures or intra-articular hyaline cartilage.

Conclusions

SG meniscus injections are feasible and can accurately and safely deliver injectates such as regenerative agents into bodies and posterior horns of the medial and lateral menisci. The role of SG intrameniscal injections in the treatment of patients with degenerative and traumatic meniscal disorders warrants further exploration.

Level of Evidence

Not applicable.  相似文献   

13.

Background

OnabotulinumtoxinA is approved for the treatment of upper and lower limb spasticity in adults. Guidance on common postures and onabotulinumtoxinA injection paradigms for upper limb spasticity has been developed via a Delphi Panel; however, similar guidance for lower limb spasticity has not been established.

Objective

To define a clinically recommended treatment paradigm for the use of onabotulinumtoxinA for each common posture among patients with poststroke lower limb spasticity (PSLLS) and to identify the most common PSLLS aggregate postures.

Design

Clinical experts provided insight regarding onabotulinumtoxinA treatment for PSLLS using an adaptation of the Delphi consensus process.

Setting

Delphi panel.

Participants

Ten expert clinicians in neurology and physical medicine and rehabilitation who treat PSLLS.

Methods

A minimum of 2 rounds of anonymous voting occurred for each recommendation until consensus was reached (≥66% agreement). The first round was conducted via a survey; the second round was an in-person meeting.

Main Outcome Measurements

Reached consensus on muscle selection for injection, overall and per-muscle dose of onabotulinumtoxinA, number of injection sites/muscle, onabotulinumtoxinA dilution, and use of localization techniques. The most common PSLLS postures were reviewed. Recommendations were tailored toward injectors with less experience.

Results

Consensus was reached on targeted subsets of muscles for each posture. Doses ranged from 20 to 150 U for individual muscles and 50 to 300 U for limb postures. OnabotulinumtoxinA dilution 50 U/mL (2:1 ratio) was considered most appropriate but varied based on muscles selected (range, 2:1-4:1). Experts agreed that localization techniques for muscle identification during injection for all postures would be useful. For suboptimal response to injection, all panel members would increase the dose, and the majority (89%) would increase the number of treated muscles. The panel identified 3 common aggregating lower limb postures: (1) equinovarus foot and flexed toes; (2) extended knee and plantar flexed foot/ankle; and (3) plantar flexed foot/ankle and flexed toes. The recommended starting doses for each aggregate posture were 400 U, 400 U, and 300 U, respectively.

Conclusion

The modified Delphi panel process provided consensus on common muscles and corresponding onabotulinumtoxinA treatment paradigms for postures associated with PSLLS that can be used for guidance in optimizing care delivery.

Level of Evidence

V  相似文献   

14.
15.
16.

Objective

To compare the effects of 2 different injection sites of low doses of botulinum toxin type A with steroid in treating lateral epicondylalgia.

Design

Double-blind, randomized, active drug-controlled trial.

Setting

Tertiary medical center.

Participants

Patients with lateral epicondylalgia for >6 months were recruited from a hospital-based outpatient population (N=26). A total of 66 patients were approached, and 40 were excluded. No participant withdrew because of adverse effects.

Interventions

Patients were randomly assigned into 3 groups: (1) botulinum toxin epic group (n=8), who received 20U of botulinum toxin injection into the lateral epicondyle; (2) botulinum toxin tend group (n=7), who received 20U of botulinum toxin injected into tender points of muscles; and (3) steroid group (n=11), who received 40mg of triamcinolone acetonide injected into the lateral epicondyle.

Main Outcome Measures

A visual analog scale, a dynamometer, and the Patient-Rated Tennis Elbow Evaluation were used to evaluate the perception of pain, maximal grip strength, and functional status, respectively. Outcome measures were assessed before intervention and at 4, 8, 12, and 16 weeks after treatment. The primary outcome measure was a visual analog scale.

Results

At 4 weeks after injection, the steroid group was superior to the botulinum toxin tend group in improvement on the visual analog scale (P=.006), grip strength (P=.03), and Patient-Rated Tennis Elbow Evaluation (P=.02). However, these differences were not observed at the 8-, 12-, and 16-week follow-up assessments. There was no significant difference between the steroid and botulinum toxin epic groups.

Conclusions

Injections with botulinum toxin and steroid effectively reduced pain and improved upper limb function in patients with lateral epicondylalgia for at least 16 weeks. The onset of effect was earlier in the steroid and botulinum toxin epic groups than in the botulinum toxin tend group.  相似文献   

17.

Objective

To determine relationships between pain sites and pain intensity/interference in people with lower limb amputations (LLAs).

Design

Cross-sectional survey.

Setting

Community.

Participants

Lower limb prosthesis users with unilateral or bilateral amputations (N=1296; mean time since amputation, 14.1y).

Interventions

Not applicable.

Main Outcome Measures

Patient-Reported Outcomes Measurement Information System (PROMIS) pain intensity (1 item to assess average pain), PROMIS pain interference (4-item short form to assess the consequences of pain in desired activities), and questions that asked participants to rate the extent to which each of the following were a problem: residual limb pain (RLP), phantom limb pain (PLP), knee pain on the nonamputated side, back pain, and shoulder pain.

Results

Nearly three quarters (72.1%) of participants reported problematic pain in 1 or more of the listed sites. Problematic PLP, back pain, and RLP were reported by 48.1%, 39.2%, and 35.1% of participants, respectively. Knee pain and shoulder pain were less commonly identified as problems (27.9% and 21.7%, respectively). Participants also reported significantly (P<.0001) higher pain interference (T-score ± SD, 54.7±9.0) than the normative sample based on the U.S. population (T-score ± SD, 50.0±10.0). Participants with LLAs rated their pain intensity on average ± SD at 3.3±2.4 on a 0-to-10 scale. Pain interference (ρ=.564, P<.0001) and intensity (ρ=.603, P<.0001) were positively and significantly correlated with number of pain sites reported.

Conclusions

Problematic pain symptoms, especially RLP, PLP, and back pain, affect most prosthetic limb users and have the potential to greatly restrict participation in life activities.  相似文献   

18.

Objective

To determine the association between the amplitude of vastus medialis (VM) Hoffmann reflex (H-reflex) and pain level, self-reported physical function, and chronicity of pain in women with patellofemoral pain (PFP).

Design

Cross-sectional study.

Setting

Laboratory of biomechanics and motor control.

Participants

Women diagnosed with PFP (N=15) aged 18 to 35 years.

Interventions

Not applicable.

Main Outcome Measures

Data on worst pain level during the previous month, self-reported physical function, and symptom duration (chronicity) were collected from the participants. Maximum evoked responses were obtained by electrical stimulation applied to the femoral nerve and peak-to-peak amplitudes of normalized maximal H-reflexes (maximal Hoffmann reflex/maximal motor wave ratios) of the VM were calculated. A Pearson product-moment correlation matrix (r) was used to explore the relations between the amplitude of VM H-reflex and worst pain during the previous month, self-reported function, and chronicity of pain.

Results

Strong negative correlations were found between the amplitude of VM H-reflex and worst pain in the previous month (r=?.71; P=.003) and chronicity (r=?.74; P=.001). A strong positive correlation was found between the amplitude of VM H-reflex and self-reported physical function (r=.62; P=.012).

Conclusions

The strong and significant relations reported in this study suggest that women with PFP showing greater VM H-reflex excitability tend to have lower pain, better physical function, and more recent symptoms. Therefore, rehabilitation strategies designed to increase the excitability of the monosynaptic stretch reflex should be considered in the treatment of women with PFP if their effectiveness is demonstrated in future studies.  相似文献   

19.

Background

As our population ages, neurogenic claudication (NC) from central canal stenosis of the lumbar spine is becoming an increasingly common condition. Studies have been undertaken to assess the efficacy of caudal, interlaminar, or unilateral transforaminal epidural injections, but bilateral transforaminal epidural injections (BTESIs) have not been evaluated to date.

Objective

To assess the therapeutic value and long-term effects of fluoroscope-guided BTESIs in patients with NC from degenerative lumbar spinal stenosis (DLSS) of the central spinal canal.

Design

Case series.

Setting

Single institution spine clinic.

Patients

Twenty-six adults between the ages of 40 and 90 years with a diagnosis of DLSS and a history of subacute or chronic NC.

Methods/Interventions

Patients meeting inclusion criteria received fluoroscope-guided BTESI of local anesthetic and steroid at the level immediately below the most stenotic level. Patient self-reported pain level, activity level, and overall satisfaction were recorded by telephone interview at 1, 3, and 6 months after injection by an independent observer.

Main Outcome Measures

Pain score and Swiss Spinal Stenosis score at baseline, 1, 3, and 6 months.

Results

Of the 22 participants eligible for analysis, 20, 19, and 18 had follow-up data available at 1, 3, and 6 months, respectively. Reduction in numeric pain scale score of at least 50% was noted in 30% of participants at 1 month, 53% at 3 months, and 44% at 6 months. Swiss Spinal Stenosis subscale scores indicated a significant reduction in the proportion of participants reporting the presence of severe pain in the back, buttocks, and legs (particularly the back or buttocks) at 1, 3, and 6 months of follow-up compared with baseline (P < .05). The proportion of participants reporting severe weakness in the legs or feet also decreased after injection and was statistically significant at 3 months of follow-up (P = .04).

Conclusions

Fluoroscope-guided BTESI was moderately effective in reducing pain, improving function, and achieving patient satisfaction in patients with NC from DLSS at the central spinal canal in this clinical case series.

Level of Evidence

IV  相似文献   

20.

Objectives

To examine the effect of experimental knee pain on perceived knee pain and gait patterns and to examine the efficacy of transcutaneous electrical nerve stimulation (TENS) on perceived knee pain and pain-induced knee gait mechanics.

Design

Crossover trial.

Setting

Biomechanics laboratory.

Participants

Recreationally active, individuals without musculoskeletal pain aged 18 to 35 years (N=30).

Interventions

Thirty able-bodied individuals were assigned to either a TENS (n=15) or a placebo (n=15) group. All participants completed 3 experimental sessions in a counterbalanced order separated by 2 days: (1) hypertonic saline infusion (5% NaCl); (2) isotonic saline infusion (0.9% NaCl); and (3) control. Each group received sensory electrical stimulation or placebo treatment for 20 minutes, respectively.

Main Outcome Measures

Perceived pain was collected every 2 minutes using a 10-cm visual analog scale (VAS) for 50 minutes and analyzed using a mixed model analysis of covariance with repeated measures. Gait analyses were performed at baseline, infusion, and treatment. Sagittal and frontal knee angles and internal net joint torque across the entire stance were analyzed using a functional data analysis approach.

Results

Hypertonic saline infusion increased perceived pain (4/10cm on a VAS; P<.05) and altered right knee angle (more flexion and less abduction; P<.05) and internal net joint torque (less extension and greater abduction; P<.05) across various stance phases. TENS treatment reduced perceived pain and improved right sagittal gait abnormalities as compared with placebo treatment (P<.05).

Conclusions

This pain model increases perceived pain and induces compensatory gait patterns in a way that indicates potential quadriceps weakness. However, TENS treatment effectively reduces perceived pain and restores pain-induced gait abnormalities in sagittal knee mechanics.  相似文献   

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